Fact-checked by Grok 2 weeks ago

Feeble-minded

Feeble-mindedness was a term employed in late 19th- and early 20th-century and to classify individuals with congenital intellectual impairments that limited their capacity for independent social adaptation and economic competition, often defined as mental defect arising from rendering the affected unable to manage ordinary prudence or equal terms with the normatively . The designation, which encompassed varying degrees of deficiency but typically highlighted milder cases (mental age roughly 8-12 years, corresponding to modern IQ equivalents of 50-70), originated in European classifications and gained prominence in the United States through Henry H. Goddard's adaptation of the Binet-Simon at the Training School, where he quantified it via testing thresholds below which persons were deemed incapable of self-support without . Goddard's research, including pedigree studies like , empirically documented high familial recurrence rates—up to 65% hereditary in institutionalized cases—positing feeble-mindedness as a Mendelian trait with dysgenic implications for societal and crime. This framework fueled eugenic interventions, including institutional segregation, laws upheld in (1927), and restrictive immigration policies under the 1924 Johnson-Reed Act, which Goddard influenced by screening arrivals at for low test performance, estimating 40-80% of certain immigrant groups as feeble-minded based on observed distributions. While subsequent critiques highlighted testing biases and environmental confounders, the term's causal emphasis on genetic origins aligned with estimates from twin and adoption studies later confirming substantial inherited variance in (50-80%), underscoring persistent real-world correlates like elevated and outcomes among low-IQ cohorts.

Definition and Classification

Historical Definitions

The term "feeble-minded" emerged in English usage by the 1530s to describe a lack of strength or vigor, distinct from mere physical . In medical and psychological contexts, it gained prominence in the mid- in the United States, where it denoted individuals displaying a marked lack of productivity and capacity for self-support, often attributed to inherent mental limitations rather than transient environmental factors. By the late , the term had evolved to encompass a broad category of congenital or early-onset intellectual impairments, with and authorities adopting it to classify those unable to compete in economic or social spheres without assistance. In the early , definitions became more formalized through psychometric assessment. Psychologist , who adapted the Binet-Simon intelligence scale for English speakers in 1908, applied "feeble-mindedness" primarily to high-grade cases—individuals with mental ages equivalent to adults but intellectual capacities akin to children aged 8 to 12, capable of rudimentary tasks yet prone to dependency and moral lapses. This aligned with contemporaneous classifications distinguishing "idiots" (mental age under 2 years), "imbeciles" (2–7 years), and "morons" or feeble-minded (7–12 years), where the latter group constituted the majority and posed societal risks due to their numbers and reproductive potential. U.S. physician Walter E. Fernald, in his 1914 address, characterized the feeble-minded as a "parasitic, predatory class" inherently incapable of self-maintenance, frequently exhibiting hereditary patterns of , criminality, and across generations. Legislative definitions reinforced this framework. The British Mental Deficiency Act of 1913 specified "feeble-minded" persons as those with mental defectiveness present from birth or early age, manifesting in such pronounced impairment as to necessitate ongoing care, supervision, and control for their protection and that of others. In the U.S., early 20th-century surveys and institutional records similarly prioritized inability to secure or retain employment and familial histories of defect, estimating prevalence at 2–3% of the population based on institutional admissions and community assessments. These criteria emphasized causal persistence over temporary setbacks, privileging evidence from longitudinal family tracing and early IQ proxies over subjective diagnoses. By the , quantitative thresholds solidified, with feeble-mindedness equated to intelligence quotients below 70 on Stanford-Binet scales, though qualitative judgments of adaptive failure remained integral.

IQ-Based Categorization

In the early , the classification of feeble-mindedness relied on derived from Binet-Simon scales, later quantified as IQ scores, to delineate degrees of intellectual deficiency manifesting as social incompetence. , adapting the Binet scale for English use, formalized subdivisions in 1910, designating "idiots" for the lowest functioning ( up to 2-3 years, equivalent to IQ 0-25), "imbeciles" for intermediate levels ( 3-7 years, IQ 26-50), and introducing "" for the highest grade within feeble-mindedness ( 8-12 years, IQ 51-70). These categories encompassed all forms of innate feeble-mindedness, defined not solely by IQ thresholds but by arrested causing inability to compete in everyday affairs without . By the 1920s and 1930s, IQ ranges stabilized in clinical practice, with morons often pinpointed at 50-75 to reflect borderline functionality in simple tasks but persistent judgment deficits. Edgar Doll, in a analysis, reinforced that only individuals meeting both IQ criteria and demonstrated social inadequacy qualified as feeble-minded, critiquing overreliance on alone due to age-related IQ declines. British classifications, such as those by A.F. Tredgold, paralleled this by grouping feeble-minded above imbeciles ( above 7 years, akin to levels), emphasizing empirical observation of adaptive failure over strict IQ cutoffs. The overall threshold for feeble-mindedness hovered around IQ 70-75 as the upper limit, distinguishing it from dull-normal intelligence (IQ 75-85), though diagnostic overlap necessitated case-by-case assessment via institutional testing.
CategoryApproximate IQ RangeMental Age Equivalent
Idiot0-250-3 years
Imbecile25-503-7 years
Moron50-758-12 (up to 14) years

Transition to Modern Terms

The term "feeble-minded," prevalent in early 20th-century classifications of intellectual impairment, gradually gave way to "mental retardation" by the mid-20th century as professional bodies sought standardized, less archaic descriptors tied to IQ testing and adaptive functioning. The American Association on Mental Deficiency (AAMD)—renamed from the Association of Medical Officers of American Institutions for Idiotic and Feeble-Minded Persons in 1933—began emphasizing "mental retardation" in its 1959 manual, defining it as significantly subaverage intellectual functioning (IQ below 70-75) with deficits in adaptive behavior manifesting before age 18. This shift aligned with post-World War II expansions in psychological assessment, replacing vague historical categories like "high-grade feeble-minded" (often IQ 50-70) with graded levels: mild (IQ 50-55 to 70), moderate (35-40 to 50-55), severe (20-25 to 35-40), and profound (below 20-25). The transition reflected both scientific refinement and efforts to mitigate pejorative connotations, as terms like "feeble-minded," "moron" (coined by Henry H. Goddard in 1910 for IQ 51-70), "imbecile," and "idiot" entered colloquial slang as insults, undermining clinical neutrality. By the 1970s, the AAMD (later AAMR) further evolved the definition in 1973 to prioritize adaptive deficits over IQ alone, acknowledging environmental influences while retaining empirical measurement. This era's terminology persisted in diagnostic manuals, with the DSM-II (1968) adopting "mental retardation" and the DSM-III (1980) specifying developmental onset. By the late , "mental retardation" faced similar stigmatization, prompting further rebranding to "" amid advocacy for dignity and inclusion, though critics argued such euphemistic shifts—termed the "euphemism treadmill"—fail to alter the underlying condition's or societal costs. In 2010, U.S. federal law via replaced "mental retardation" with "" across statutes, influencing education and welfare policies. The (2013) formalized "intellectual developmental disorder," requiring deficits in intellectual functioning (e.g., IQ ≤70 with adaptive impairments) emerging in childhood, emphasizing longitudinal assessment over static labels. International bodies like the WHO followed suit in (2019), using "disorders of intellectual development" to denote similar criteria. These modern terms prioritize functional impact and early intervention, yet retain IQ thresholds grounded in psychometric data, despite debates over cultural biases in testing.

Historical Context

19th-Century Origins

The term "feeble-minded" emerged in the mid-nineteenth century within medical and educational discourse to denote individuals exhibiting intellectual impairments milder than profound idiocy, often encompassing those capable of some self-care but requiring supervision. This usage distinguished it from earlier, more severe categorizations like "idiot," drawing from observational assessments of cognitive function rather than standardized testing. Etymologically, "feeble" traces to Old French roots meaning "lacking strength," while the full term evoked Latin flebilis, implying a condition "to be lamented" for its social and hereditary implications, though not as incapacitating as lower-functioning disorders. By the 1880s, it had gained traction in professional literature as a catch-all for varying degrees of mental deficiency, replacing vaguer terms like "simpleton" and reflecting a shift toward graded classifications influenced by French alienists such as Jean-Étienne Dominique Esquirol, whose 1838 work Des Maladies Mentales delineated idiocy into profound, moderate, and slight forms—precursors to English-language hierarchies. In and the , nineteenth-century classifications of feeble-mindedness arose from asylum records and early psychiatric observations, emphasizing developmental arrest over acute . Esquirol's framework, based on empirical studies of over 10,000 patients, posited that slight idiocy—later aligned with feeble-mindedness—manifested in incomplete reasoning and moral faculties, often linked to congenital factors like parental intemperance or . and physicians adapted these ideas, with reports from the 1840s onward documenting cases where affected individuals displayed functional limitations in learning and adaptation, prompting debates on trainability. This period saw no reliance on quantitative metrics; diagnoses relied on qualitative judgments, such as failure to progress in by age benchmarks, underscoring causal attributions to innate deficits rather than environmental remediation alone. Institutional responses crystallized these concepts, with the founding of specialized facilities marking the term's practical application. In , Hervey B. Wilbur established the Elm Hill Private Institution for Feeble-Minded Youth in —the first U.S. school dedicated to such cases—admitting children aged 6 to 20 with mild to moderate impairments for custodial training in habits and rudimentary skills. Similar initiatives followed, including Samuel Gridley Howe's Perkins Institution expansions, reflecting optimism in physiological education methods pioneered by Édouard Séguin, who by had published works advocating sensory-motor training for "idiots and backward children," many classified as feeble-minded. These efforts, supported by state reports estimating thousands of undetected cases in populations (e.g., surveys in the 1850s identifying 1,200+ feeble-minded per million residents), highlighted growing recognition of feeble-mindedness as a public burden tied to and , setting precedents for later eugenic policies.

Early 20th-Century Expansion

In the early 1900s, the concept of feeble-mindedness expanded in scope and application primarily through the introduction of standardized testing in the United States. Psychologist , research director at the Training School for Feeble-Minded Boys and Girls in from 1906, adapted the French Binet-Simon scale in 1908, marking the first systematic IQ test in . This enabled broader screening beyond custodial institutions, particularly in public schools, where surveys identified previously undetected cases among children deemed "dull" or educationally challenged. By 1914, Goddard estimated that approximately 2% of the U.S. population qualified as feeble-minded based on these metrics, a figure that encompassed not only severe intellectual impairments but also milder forms linked to social deviance. Goddard further delineated the category by coining the term "" in 1910 for individuals with s of 8 to 12 years (roughly IQ 51-70), distinguishing them from "imbeciles" (mental age 3-7 years) and "idiots" (under 3 years); this tripartite system, rooted in Binet's age-grade framework, extended feeble-mindedness to higher-functioning persons capable of basic but prone to what Goddard viewed as hereditary moral failings like and criminality. His study, , examined two branches descending from Revolutionary War soldier Martin Kallikak: one legitimate line of upstanding citizens and an illegitimate one tainted by feeble-mindedness across six generations, including 480 descendants with high rates of institutionalization, illegitimacy, and , which Goddard attributed to a single ancestral lapse into degeneracy with a "feeble-minded" . The study, involving over 1,000 pages of genealogical and photographic evidence, reinforced hereditarian explanations and amplified calls for to prevent transmission. This diagnostic expansion intersected with immigration scrutiny when Goddard applied modified tests at in 1913, administering nonverbal puzzles like block designs and form-board tasks to 2,000 arrivals; results indicated 40-87% feeble-mindedness rates among groups such as (87%), (83%), (80%), and (79%), far exceeding native benchmarks and fueling eugenic alarms over national stock dilution. These tests, however, relied on non-verbal but culturally unfamiliar tasks given in English to often illiterate, non-native speakers, yielding inflated deficiency rates that contemporaries like Goddard interpreted as innate inferiority rather than linguistic or experiential artifacts. By 1914, in Feeble-Mindedness: Its Causes and Consequences, Goddard synthesized data from 1,500 cases to argue that 75% of feeble-mindedness stemmed from , with institutional records showing disproportionate representation in almshouses (e.g., 100 of 105 mothers of illegitimate children in one county) and prisons, thus framing the condition as a primary driver of social ills and justifying scaled-up interventions.

Institutional Practices

In the United States during the early , institutions for the feeble-minded largely adopted the colony plan, which organized residents into small, family-like groups under close supervision to facilitate both training and custody while leveraging . This approach divided facilities into school departments for educable higher-grade cases—focusing on basic , , and vocational skills—and custodial departments for lower-grade idiots and imbeciles requiring permanent oversight, with the latter comprising the majority of admissions by the . Practices emphasized by to prevent procreation, rigorous protocols to curb outbreaks, and structured daily routines including communal meals, limited , and compulsory labor on institutional farms or in workshops, which reduced costs—for instance, from $300 to $100 annually in through resident productivity. Upon admission, staff conducted observational assessments or early IQ tests to classify residents, determining placement; higher-grade morons might parole after demonstrating self-sufficiency (10-30% success rate), while lower-grade cases received lifelong confinement with medical monitoring for or comorbidities. By , the U.S. operated over 60 state institutions housing approximately 40,000 residents, reflecting a broader shift from optimistic educational models of the late to predominantly custodial practices justified by perceived hereditary incurability and societal risks. Internal operations often prioritized containment over rehabilitation, with overcrowding leading to stratified "back wards" for the most dependent, where care involved basic sustenance, restraint for behavioral issues, and minimal therapeutic intervention beyond routine medical checks. Labor programs, such as sewing or agriculture, were framed as therapeutic but primarily served institutional self-sufficiency, though conditions varied by facility—southern states like emphasized control with scant educational resources. In the , institutional practices under the 1913 Mental Deficiency Act classified entrants as idiots (profound impairment), imbeciles (moderate), feeble-minded (mild, often with social deviance), or moral defectives, with admissions triggered by petitions citing neglect, , criminality, or risks like illegitimate , extending beyond clinical need to encompass eugenic and controls. Daily life mirrored U.S. custodial models, featuring gendered , mandatory work in laundries, farms, or attendant roles (remunerated minimally with or treats), and periodic medical reviews every five years post-initial detention, though superintendents frequently opposed discharges to maintain oversight. Facilities like those under the Poor prioritized economic utility and containment, with rehabilitation limited to higher-functioning cases; by the , this resulted in long-term institutionalization for thousands, often indefinitely, amid concerns over community "menace."

Scientific Foundations

Heritability of Intelligence

Behavioral genetic studies, including twin and research, consistently estimate the of —as proxied by IQ tests—at 50% to 80% in adults, indicating that genetic factors account for the majority of variance in cognitive ability within populations of similar socioeconomic backgrounds. This figure rises linearly with age, starting at approximately 41% in childhood (around age 9), increasing to 55% in (age 12), and reaching 66% or higher by young adulthood (age 18), where it stabilizes near 80%. Monozygotic twins reared apart exhibit IQ correlations approaching those of twins reared together (around 0.86 ), underscoring the dominance of genetic over shared environmental influences in adulthood. Genome-wide association studies (GWAS) and polygenic score analyses further corroborate a polygenic genetic for , with thousands of variants contributing small effects; however, these molecular methods currently explain only 7-10% of variance in Europeans, a fraction attributed to limitations in sample size and variant coverage rather than negating broader estimates from classical methods. Twin studies yield higher heritability partly because they capture all genetic effects, including rare variants and gene-environment interactions, whereas GWAS focus on common SNPs. Adoption studies reinforce this, showing that children adopted into higher-SES homes regress toward their biological parents' IQ levels over time, diminishing shared environmental effects to near zero by . At the lower tail of the IQ —relevant to historical classifications of feeble-mindedness (typically IQ below 70)—familial aggregation persists, with siblings and of low-IQ individuals showing elevated rates of , consistent with the polygenic and nature of the trait across its range. Empirical data from large-scale twin registries indicate that estimates do not substantially differ at extremes, though ascertainment biases in clinical samples can inflate apparent environmental roles; nonetheless, genetic factors predominate, as by concordances in monozygotic versus dizygotic twins for diagnoses excluding known syndromes. These findings counter earlier environmentalist emphases in , which often underrepresented due to ideological preferences for malleability narratives, but align with causal from diverse methodologies prioritizing genetic realism.

Role of IQ Testing

IQ testing emerged as a pivotal tool for objectively classifying feeble-mindedness, providing a standardized metric to assess intellectual capacity beyond subjective clinical impressions. The Binet-Simon scale, developed by and Théodore Simon in 1905, was initially designed to identify schoolchildren requiring by evaluating through age-appropriate tasks. In the United States, Henry Goddard adapted this scale into English in 1908 and applied it systematically at the Vineland Training School to diagnose degrees of mental deficiency, defining feeble-mindedness as a score below an IQ equivalent of 70, which he viewed as indicative of inherent cognitive limitation rather than mere educational delay. Goddard's administration of the test to over 15,000 schoolchildren led to recommendations for and sterilization of those classified as feeble-minded, establishing IQ scores as a diagnostic threshold for hereditary intellectual impairment. Lewis Terman's 1916 revision, the Stanford-Binet Intelligence Scales, formalized the IQ quotient as ( divided by chronological age) multiplied by 100, enabling precise categorization of mental levels: idiots (IQ below 25), (IQ 25-50), and (IQ 50-70), with feeble-mindedness encompassing the moron and imbecile ranges as socially burdensome yet ambulatory deficiencies. This scale's normative on large U.S. samples facilitated widespread clinical and institutional use, correlating low IQ with poor adaptive functioning and predicting outcomes like dependency or delinquency, as evidenced by Goddard's testing of inmates where 87-93% of certain immigrant groups scored as feeble-minded. Unlike prior reliance on anecdotal observations, IQ testing quantified the g-factor underlying cognitive tasks, supporting causal inferences of genetic when environmental confounders were controlled in institutional cohorts. Empirical validation of IQ's role came from longitudinal applications, such as Goddard's 1912 Kallikak family study, where Binet-derived scores traced feeble-mindedness across generations, attributing it to a single recessive trait amplified by . By the , IQ thresholds below 70-75 became statutory benchmarks in U.S. courts and asylums for committing individuals deemed incapable of self-support, with tests demonstrating high test-retest reliability (r > 0.90) and for vocational failure. Critics later challenged cultural biases in early scales, yet data from re-normed versions confirmed low-IQ persistence as a stable trait, with twin studies post-1920 reinforcing heritability estimates of 0.7-0.8 for variance in feeble-minded ranges. Thus, IQ testing shifted from vague descriptors to measurable deficits, informing policies on despite academic sources' tendency to underemphasize genetic loadings due to ideological preferences for environmental explanations.

Evidence from Family Studies

Family studies in the early provided initial for the hereditary transmission of feeble-mindedness by tracing patterns of mental deficiency across generations within specific lineages. Henry Goddard's 1912 study of examined the descendants of Martin Kallikak Sr., a soldier, who fathered an illegitimate son with a feebleminded tavern maid in 1776, contrasting this "bad" line with his legitimate progeny. Among approximately 480 descendants in the illegitimate branch traced through genealogical records and intelligence assessments, Goddard reported 143 "degenerates," including 36 confirmed feebleminded individuals, alongside elevated rates of (46 cases), (33 cases), and criminality, attributing these outcomes to inherited feeble-mindedness rather than solely environmental factors. In the legitimate line of over 496 descendants, no feeblemindedness was identified, with members achieving professional success, such as physicians and lawyers, suggesting a Mendelian-like inheritance pattern where feeble-mindedness acted as a recessive manifesting under certain unions. These findings built on prior pedigree analyses, like Richard Dugdale's 1877 study, which documented 1,200 descendants over seven generations with 280 paupers, 440 criminal records, and high rates of mental defect, implying familial clustering of low intelligence and antisocial traits. 's methodology involved house-to-house inquiries, reputation-based classifications, and early Binet-Simon tests on living subjects, yielding correlations where feebleminded parents produced feebleminded offspring at rates exceeding population baselines (e.g., 82% of children from feebleminded mothers tested as deficient). While subsequent critiques highlighted ascertainment bias—such as retrospective labeling without uniform testing and potential environmental confounds like —these studies established preliminary on familial aggregation, with low-intelligence relatives sharing 2-4 times higher risk of deficiency compared to controls. Modern family aggregation research corroborates these patterns for low IQ (typically IQ < 70, akin to historical feeble-mindedness thresholds), showing intraclass correlations of 0.40-0.50 between parents and children, and 0.45-0.55 among siblings, indicating substantial shared genetic variance even after partial environmental controls. studies within biological families further isolate , estimating 40-60% genetic contribution to variance in cognitive ability at the lower tail, where familial resemblance persists despite separation from defective relatives. Such evidence underscores causal genetic influences over purely nurture-based explanations, as low IQ clusters in pedigrees beyond socioeconomic matching, though gene-environment interactions modulate expression.

Policy Applications

Institutionalization Efforts

In the mid-19th century, institutionalization efforts for individuals classified as feeble-minded began with educational and custodial models aimed at from general society. The first such institution in the United States, the Massachusetts School for Idiotic and Feeble-Minded Youth, was established in 1848 in under the direction of , initially as an experimental to provide training for children with intellectual impairments. By 1874, public institutions had been founded in seven states, reflecting growing recognition of the need for specialized care to address perceived social burdens such as dependency and moral risks. These early facilities transitioned from small, private educational settings to larger state-supported custodial institutions between 1876 and 1916, driven by expanding state involvement and shifting priorities toward long-term confinement rather than short-term training. Proponents argued that institutionalization prevented feeble-minded individuals—often defined by IQ levels below 70 and associated with behaviors like promiscuity, criminality, and pauperism—from reproducing and propagating hereditary defects, a view rooted in emerging eugenic principles emphasizing segregation as a tool for societal protection. State laws increasingly enabled involuntary commitment, with indeterminate sentences allowing lifelong detention upon judicial determination of mental defectiveness, as seen in facilities like the Waverley School in Massachusetts (later Walter E. Fernald State School) and the Vineland Training School in New Jersey. By the early , data documented significant growth in institutional populations, with 20,731 feeble-minded individuals enumerated in specialized institutions as of December 31, 1903, excluding those in general hospitals or almshouses. This expansion accelerated amid eugenic surveys, such as Connecticut's 1916 assessment identifying 11,962 cases requiring control, which recommended broader institutionalization to curb population-level risks from unchecked reproduction. Efforts peaked in the , with states like opening large-scale centers such as the Eastern State Institution for the Feeble-Minded and Epileptic (construction began 1903), housing thousands under custodial regimes focused on rather than . These initiatives were justified empirically by studies linking feeble-mindedness to multigenerational , though critics later contested the assumptions underlying mass .

Sterilization Laws and Eugenics

In the early 20th century, advocates in the United States promoted as a means to prevent the reproduction of individuals deemed "feeble-minded," viewing low intelligence as a hereditary that imposed social and economic burdens. enacted the first such law in 1907, authorizing sterilization of certain inmates of state institutions, including the feeble-minded, though it was later struck down and reenacted. By the , over 30 states had passed similar legislation, often modeled on drafts by eugenicist Harry Laughlin, targeting those classified as mentally defective through institutional commitment, family pedigrees, or rudimentary IQ assessments. These laws typically applied to residents of facilities for the "feeble-minded" or epileptics, with procedures justified as surgical interventions to halt the transmission of purported genetic deficiencies. The U.S. Supreme Court's 1927 decision in upheld Virginia's Eugenical Sterilization Act, affirming the sterilization of , an 18-year-old woman institutionalized at the State Colony for Epileptics and Feeble-Minded after giving birth out of wedlock and deemed to have inherited mental deficiency from her mother and daughter. Justice wrote the majority opinion, stating, "It is better for all the world, if instead of waiting to execute degenerate offspring for crime, or to let them starve for their imbecility, society can prevent those who are manifestly unfit from continuing their kind," and famously concluded, "Three generations of imbeciles are enough." This ruling, which faced no dissent from the eight participating justices, provided legal precedent for expanded programs, contributing to an estimated 60,000 to 70,000 forced sterilizations nationwide by the mid-20th century, with performing around 20,000 procedures under its 1909 law, primarily on those labeled feeble-minded or otherwise unfit. Eugenics organizations, such as the , lobbied for these measures, arguing that feeble-mindedness—often equated with IQ scores below 70—followed patterns and proliferated among the poor and immigrants, necessitating intervention to improve national stock. Proponents cited institutional data showing high rates of mental deficiency in families of the sterilized, though critics later noted methodological flaws, including subjective classifications and neglect of environmental factors in . State boards, like Virginia's Board of Eugenics established in 1924, reviewed cases and approved operations, with sterilizations continuing into the 1970s in some jurisdictions despite growing opposition post-World War II.

Immigration and Segregation Measures

United States immigration laws from the late 19th century onward explicitly prohibited the entry of individuals classified as feeble-minded. The Immigration Act of 1882 excluded "idiots" and "lunatics," establishing early precedents for barring those deemed mentally deficient. Subsequent legislation expanded these categories; the Immigration Act of 1907 added "imbeciles" and "feeble-minded" persons to the list of excludable aliens, mandating medical examinations at ports of entry to identify such conditions. The Immigration Act of 1917 further codified exclusions for "all idiots, imbeciles, feeble-minded persons," alongside literacy tests aimed at filtering lower-intelligence immigrants, reflecting concerns over the importation of hereditary mental defects. Eugenicists significantly shaped these restrictions, particularly through advocacy for national-origin quotas. , director of the , testified before Congress in 1920 and 1924, presenting data alleging disproportionate rates of feeble-mindedness among immigrants from Southern and compared to , arguing that unrestricted threatened the nation's genetic stock. This influenced the , which imposed quotas favoring Northwestern Europeans—approximately 82% of slots allocated to them—while severely limiting others, justified in part by claims of higher institutionalization rates for mental deficiency among recent arrivals from restricted regions. Enforcement involved and genealogical reviews, with over 6,000 immigrants deported annually in the on mental grounds by 1927. Segregation policies complemented immigration controls by isolating domestic feeble-minded populations to curb reproduction and social costs. By the early 20th century, states like implemented of childbearing-age individuals in custodial institutions, viewing it as a humane alternative to sterilization for preventing hereditary transmission. Facilities such as the Colony for Epileptics and Feeble-Minded, established in 1910, housed thousands under indefinite commitment laws, with policies prioritizing separation of the "high-grade" feeble-minded—who could propagate undetected—from society. This approach, debated against sterilization in eugenic circles, resulted in over 100,000 institutionalized by 1923 across U.S. facilities, justified by studies estimating feeble-mindedness accounted for 50% of populations and significant crime rates. Such measures persisted until the mid-20th century, when deinstitutionalization trends reversed them amid shifting views on and rights.

Debates and Rationales

Arguments for Eugenic Interventions

Proponents of eugenic interventions for the feeble-minded, a term historically denoting individuals with low intelligence or mental deficiency as measured by early IQ tests, argued primarily from the premise of high of cognitive traits. , in his 1912 study , traced the descendants of Martin Kallikak Sr., claiming that an illegitimate line produced 480 individuals among whom 143 were feeble-minded, prone to immorality, and socially burdensome, while the legitimate line yielded successful professionals; he concluded that feeble-mindedness followed a recessive pattern, necessitating sterilization or lifelong segregation to prevent its propagation. This view aligned with broader eugenic claims that mental deficiency was predominantly genetic, supported by family pedigree analyses showing clustering of low intelligence across generations, and thus interventions like sterilization would reduce the prevalence of such traits in the population. A core rationale emphasized reducing societal costs, as feeble-minded individuals were asserted to impose disproportionate economic and moral burdens through higher rates of pauperism, criminality, and institutionalization. Eugenics advocates, including those behind the American Eugenics Society, cited data from institutional records indicating that the mentally deficient reproduced at rates exceeding the general population, perpetuating cycles of dependency; for instance, Charles Davenport's Eugenics Record Office documented familial patterns linking low intelligence to vice and poverty, arguing that unchecked reproduction exacerbated welfare expenditures and public safety risks. In the 1927 Supreme Court case Buck v. Bell, defenders of Virginia's sterilization law contended that Carrie Buck, deemed feeble-minded alongside her mother and infant daughter, exemplified how non-intervention allowed "degenerates" to multiply, with Justice Oliver Wendell Holmes Jr. affirming in the majority opinion that preventive measures like salpingectomy were preferable to allowing "imbeciles" to produce offspring likely to require execution for crimes or starve due to incapacity, thereby safeguarding societal welfare. Eugenicists further posited that such interventions promoted national vitality by elevating average population intelligence, essential for industrial and military competitiveness. Madison Grant, in The Passing of the Great Race (1916), warned that unchecked reproduction among the "unfit"—including the feeble-minded, often associated with immigrant or lower-class stocks—diluted superior hereditary lines, advocating negative eugenics like sterilization to preserve intellectual capacity and avert civilizational decline; this echoed Francis Galton's foundational 1883 eugenics framework, which prioritized breeding for higher mental qualities based on observed familial genius clustering. These arguments, grounded in contemporaneous biometric data and twin-like pedigree evidence, framed sterilization not as punitive but as a measure akin to , with proponents estimating it could halve institutional populations within generations by curbing hereditary transmission. Despite later methodological critiques of studies like Kallikak's for overlooking environmental confounders, advocates maintained that the weight of hereditary evidence justified targeted restrictions to avert dysgenic trends.

Criticisms and Ethical Objections

Critics of policies targeting the "feeble-minded" have primarily objected to the coercive nature of interventions such as forced sterilization and indefinite institutionalization, arguing that these measures infringe on fundamental human autonomy and without adequate consent. In the United States, eugenic sterilization s, upheld in the 1927 case Buck v. Bell, authorized the procedure for individuals classified as mentally defective, including the "feeble-minded," often conditioning release from institutions on compliance, which undermined genuine voluntariness given the of such populations. Ethical analyses emphasize that state-mandated restrictions treat citizens as means to societal ends, violating principles of individual enshrined in philosophy and later international frameworks. Objections also center on the flawed scientific underpinnings of classifying and targeting the "feeble-minded" via IQ testing, which critics contend lacked reliability and overlooked environmental influences on cognitive outcomes. Early 20th-century eugenicists relied on discredited family studies, such as the , to assert high of feeblemindedness leading to social ills, but subsequent reviews by bodies like the American Neurological Association in 1936 revealed these claims overstated genetic while ignoring nurture's role. IQ-based categorizations into "idiots," "imbeciles," and "morons" were criticized for cultural biases and arbitrary thresholds, resulting in erroneous institutionalizations and sterilizations of individuals whose conditions stemmed from , illness, or temporary factors rather than immutable defects. Broader ethical concerns highlight the risk of expansive state authority to define and eliminate "unfitness," potentially enabling discriminatory overreach and echoing totalitarian abuses, as seen in Nazi Germany's escalation of similar programs to extermination. Institutionalization efforts, intended for and control, often devolved into custodial warehouses with minimal or , prioritizing societal over humane and failing to pursue less restrictive alternatives like community support or contraception counseling. These policies, enacted in over 30 U.S. states by , sterilized approximately 60,000 people, many retroactively deemed unjust due to diagnostic errors and the absence of therapeutic benefits for the "feeble-minded" themselves. While proponents invoked public welfare, detractors argue such rationales masked prejudice against the disabled, subordinating intrinsic human dignity to utilitarian calculations of genetic "improvement."

Empirical Outcomes and Long-Term Effects

Forced sterilization programs targeting the "feeble-minded" , enacted across 32 states from 1907 onward, resulted in an estimated 60,000 to procedures by the mid-20th century, often justified as preventing the of low and associated costs like and . Despite these aims, no quantitative historical studies demonstrate reductions in -level IQ, rates, or institutionalization demands attributable to the programs; the scale—representing less than 0.05% of the U.S. over decades—was insufficient to alter genetic frequencies significantly, particularly given the multifactorial nature of and frequent misclassifications based on flawed IQ assessments. In Sweden's larger-scale effort, which sterilized approximately 63,000 individuals from 1934 to 1976 under eugenic and criteria, similar outcomes emerged: no verifiable of lowered prevalence of mental deficiency or socioeconomic burdens, with programs criticized for coercive application without rigorous follow-up on genetic or societal metrics. Institutionalization of the feeble-minded, widespread in early 20th-century U.S. and facilities housing tens of thousands, aimed to segregate low-IQ individuals to curb and societal costs but yielded empirically poor results. Longitudinal data indicate that extended institutional stays correlated with IQ declines, with children spending over 30% of their lives in such settings scoring significantly lower on standardized tests than non-institutionalized peers, attributed to deprivation of and rather than inherent progression of defects. Facilities often became overcrowded, with reports of and exacerbating cognitive stagnation; for instance, U.S. institutions for the "mentally defective" admitted over 2,000 feeble-minded patients annually by the , yet showed no reduction in to community dependency upon release. Long-term effects included sustained psychological harm to victims, with sterilized individuals reporting higher rates of , anxiety, and decades later, as documented in cohort studies of programs in and . On a societal level, these interventions failed to reverse dysgenic trends—differential where lower-IQ groups maintained higher birth rates—contributing instead to ethical reckonings that spurred deinstitutionalization in the and alternatives, which evidenced better cognitive catch-up (e.g., IQ gains of 10–20 points post-adoption from institutions). The programs' legacy persists in heightened scrutiny of genetic policy, though without empirical vindication of their preventive claims, as modern estimates (50–80% for ) underscore that environmental interventions and voluntary measures would require vastly larger scales for impact.

Cultural and Media Representations

In nineteenth-century , depicted feeble-minded characters as often childlike, vulnerable figures emblematic of social neglect and . In (1838–1839), Smike appears as a frail, intellectually limited boy enduring mistreatment at Dotheboys Hall, a fictionalized school modeled on real abuses reported in parliamentary inquiries of the era. Dickens's portrayal drew from firsthand investigations into workhouses and asylums, presenting the feeble-minded as redeemable through humane intervention rather than mere objects of pity or exclusion. Similarly, in (1841), the titular character exhibits simple-mindedness amid the , influenced by heredity and environment, reflecting contemporaneous medical views linking intellectual to parental intemperance or . These characterizations, while sentimental, critiqued systemic failures in caring for the impaired, predating formalized eugenic policies. American fiction from the same period often romanticized cognitive disability as a divine or moral counterpoint to societal flaws. James Fenimore Cooper's The Deerslayer (1841) features Hetty Hutter, a simple-minded young woman whose innocence and biblical literalism arise from her parents' illicit union, portraying her as an angelic outsider whose death underscores the perils of removing the impaired from protective isolation. Herman Melville's Billy Budd, Sailor (published 1924, written 1888–1891) presents the protagonist as strong yet stuttering and intellectually guileless, whose impulsive act leads to execution, implicitly advocating segregation to mitigate risks posed by integrated feeble-minded individuals in naval or labor settings. By the early twentieth century, eugenics infused depictions with warnings of hereditary threats, as in Jack London's "Told in the Drooling Ward" (1914), a first-person account from a California asylum where the narrator, deemed high-grade feeble-minded, reveals self-awareness and reproductive desires, highlighting undetected impairments' potential to propagate social decay amid rising institutional admissions post-1900. Eugenics-era works amplified feeble-mindedness as a dysgenic menace, blending narrative drama with policy advocacy. Henry H. Goddard's The Kallikak Family (1912), though framed as empirical research tracing one progenitor's degenerate lineage—yielding 480 descendants including 143 feeble-minded from an illicit union—employed storytelling techniques with photographs and pedigrees to popularize inheritance models, influencing over 30 U.S. sterilization statutes by 1920. John Steinbeck's Of Mice and Men (1937) portrays Lennie Small, a physically powerful yet intellectually impaired migrant worker whose inability to control strength results in fatal accidents, evoking 1930s California eugenics practices that sterilized 20,000 deemed feeble-minded between 1909 and 1979 to curb perceived burdens on public resources. Faulkner's The Sound and the Fury (1929) features Benjy Compson, a non-verbal "idiot" castrated and confined, symbolizing familial degeneration tied to moral lapses, aligning with Supreme Court rulings like Buck v. Bell (1927) upholding sterilization for societal protection. These portrayals, rooted in IQ testing expansions post-1905 and institutional growth from 3,000 U.S. residents in 1880 to 63,000 by 1923, shifted public views from compassion toward preventive exclusion, though later critiques exposed methodological flaws in hereditarian claims.

Film and Contemporary Media

In early 20th-century American cinema, the concept of the "feeble-minded" was often depicted through eugenics propaganda films that portrayed individuals with intellectual disabilities as societal burdens warranting intervention such as euthanasia or sterilization to prevent hereditary transmission. The 1917 silent film The Black Stork, directed by and starring physician Harry Haiselden, dramatized the euthanasia of infants deemed defective, including those predicted to be feeble-minded, as a moral imperative to avert future degeneracy; the film, based on Haiselden's real-life refusals to treat such children, screened intermittently until 1942 and influenced public support for eugenic policies. Similarly, the 1934 film Tomorrow's Children depicted a young woman facing forced sterilization due to her family's history of feeble-mindedness, reflecting contemporaneous legal battles like Buck v. Bell and sparking censorship debates over its explicit endorsement of eugenic measures. Adaptations of literary works also reinforced stereotypes of the feeble-minded as impulsive and dangerous. Film versions of John Steinbeck's (notably the 1939 and 1992 releases) portray Lennie Small, a with profound limitations and uncontrollable strength, as a tragic figure whose "feeble-mindedness" leads to unintended , echoing eugenic-era fears of among the cognitively impaired despite the story's sympathetic tone. In horror genres, early depictions aligned with moral models of , framing feeble-minded s—often women—as deviant or criminal precursors, perpetuating views from that linked low to . Contemporary media has largely shifted from endorsing eugenic portrayals to critiquing historical abuses, with documentaries exposing sterilizations of those labeled feeble-minded. The 2015 short Feebleminded examines North Carolina's eugenics program, which sterilized over 7,600 individuals, many falsely deemed feeble-minded, into the 1960s–1970s, highlighting coerced procedures without consent. PBS's 2018 The Eugenics Crusade details how pseudoscientific classifications of feeble-mindedness justified mass sterilizations, citing cases like Carrie Buck's 1927 Supreme Court-upheld procedure despite contested evidence of her impairment. Fictional contemporary representations of intellectual disabilities—successors to the "feeble-minded" archetype—frequently employ stereotypes such as the helpless dependent or inspirational savant, as in Forrest Gump (1994), where the protagonist's low IQ (around 75) yields success and virtue, countering eugenic narratives but risking oversimplification of cognitive variance. These portrayals, while less overtly alarmist, often underrepresent authentic experiences, with studies noting media's tendency to depict such characters as white, male, and visibly impaired, potentially sustaining subtle biases against institutional legacies. The archaic term "feeble-minded" itself appears rarely in modern discourse outside historical contexts, deemed dehumanizing and replaced by clinical terms like , though its eugenic connotations persist in analyses of policy harms.

Influence on Public Perception

The portrayal of feeble-minded individuals as a hereditary menace profoundly altered public attitudes in the early and , shifting from viewing as a charitable concern to a dysgenic threat demanding and . Eugenic literature and campaigns emphasized links between feeblemindedness and social ills, including criminality, , pauperism, and dependency, instilling fears that unchecked reproduction would degrade national stock. This framing garnered public support for interventions, with a Gallup poll showing 60% of favoring sterilization of the "feeble-minded" to prevent societal deterioration. Henry Goddard's 1912 study exemplified this influence, genealogically tracing "degeneracy" from one feeble-minded ancestor to 143 descendants exhibiting immorality and poverty, which popularized the idea of feeblemindedness as a recessive Mendelian trait propagating vice across generations. Widely disseminated in popular media and policy debates, the study amplified perceptions of the feeble-minded as hidden societal saboteurs, contributing to a 1914 legislative report estimating 75,000 feebleminded residents as a "menace" warranting institutional removal. Goddard's testing, misapplying the Binet-Simon scale, further stigmatized immigrants by reporting 79% of , 83% of , and 87% of as feeble-minded, bolstering nativist that equated intellectual deficiency with foreign influxes threatening American vitality. These narratives permeated public discourse, with eugenics advocates like Walter Fernald asserting in 1916 that the "great majority" of community criminals and prostitutes were hereditary feebleminded, rationalizing policies as preventive rather than cruelty. By the , such had normalized exclusionary measures, evident in the widespread acceptance of immigration quotas under the 1924 Johnson-Reed Act, partly justified by fears of importing feeblemindedness. Despite later revelations of testing biases— himself recanted aspects of his hereditary determinism by 1928—the entrenched endured, associating intellectual impairment with moral and eroding sympathy for community .

References

  1. [1]
    [PDF] 10-RCC-CCF PRIOR 20-JPA - MN.gov
    (1) The term feeble-minded is used genetically to inc lude all degrees of mental defect due to arrested or imperfect development as a result of which the person ...
  2. [2]
    [PDF] Binet Scale and the Diagnosis of Feeble-Minded - Scholarly Commons
    For the present, accordingly, we could agree to designate all of those as feeble-minded who test below a certain definite point on the intelligence scale.
  3. [3]
    [PDF] Feeble-mindedness : its causes and consequences - Free
    HENRY HERBERT GODDARD, Ph.D. DIRECTOR OF THE RESEARCH LABORATORY OF THE TRAINING SCHOOL. AT VINELAND, NEW JERSEY, FOR FEEBLE-MINDED. GIRLS AND BOYS. THE ...
  4. [4]
    The Burden of Feeble-Mindedness - Massachusetts Medical Society
    Oct 19, 2016 · The hereditary cases are those where the person is feeble-minded because his parents or other ancestors were feeble-minded. The accidental group ...
  5. [5]
    The Kallikak Family: A Study in the Heredity of Feeble-Mindedness ...
    Jul 30, 2021 · In September 1906, Goddard began investigating the causes of feeble-mindedness and the special needs of the feeble-minded as director of the ...
  6. [6]
    It Took A Eugenicist To Come Up With 'Moron' : Code Switch - NPR
    Feb 10, 2014 · In 1913, he sent female assistants to Ellis Island to recognize the "feeble-minded" by sight (women were more intuitive at this, he thought) and ...
  7. [7]
    The feeble-minded child. - APA PsycNet
    Backward and Feeble-minded Children. Warwick & York. Humphreys, E. J. (1936). Development deficiencies as the essential problem of mental deficiency.
  8. [8]
    The birth of American intelligence testing
    Jan 1, 2009 · Goddard's work at Vineland led him to conclusions about the origins of "feeblemindedness." He expressed those views in his most popular book, " ...
  9. [9]
    Feeble-minded - Etymology, Origin & Meaning
    late 12c., "lacking strength or vigor" (physical, moral, or intellectual), from Old French feble "weak, feeble" (12c., Modern French faible).Missing: definitions | Show results with:definitions
  10. [10]
    Feeble-mindedness • Encyclopedia - Eugenics Archive
    “Feeblemindedness” was a term that first emerged in the mid-nineteenth century in the United States to describe individuals exhibiting a lack of productivity.
  11. [11]
    Disability History Glossary - Historic England
    Feeble minded. A term used in the late 19th and early 20th centuries to describe people who would be described today as having moderate or mild learning ...<|control11|><|separator|>
  12. [12]
    Feeblemindedness - an overview | ScienceDirect Topics
    Feeblemindedness is defined as a condition of the mind or brain characterized by an intelligence score below 70, which was considered by early psychometricians ...
  13. [13]
    “Churchill's campaign against the 'feeble-minded' was deliberately ...
    The phrase “feeble-minded” was to be defined as part of the Mental Deficiency Act 1913, of which Churchill had been one of the early rafters. The Act defined ...
  14. [14]
    Henry Herbert Goddard (1866–1957) | Embryo Project Encyclopedia
    May 6, 2021 · ... intelligence test, feebleminded. In 1917 ... Inventing the Feeble Mind: A History of Intellectual Disability in the United States.
  15. [15]
    Goddard on IQ - New Learning Online
    He created a number of categories for the classification of mental retardation: a moron had an IQ of 51 to 70; an imbecile an IQ of 26–50 and an idiot an IQ of ...
  16. [16]
    [PDF] IDIOT, IMBECILE, AND MORON* | The Testing Psychologist
    Idiots, imbeciles, and morons are feeble-minded, and only they. Their condition is reflected in their social inadequacy which results from limited development ...
  17. [17]
    [PDF] From Moral Imbecility to Maladaptive Behavior - ERIC
    Apr 18, 1986 · The lowest grade of mental defectives were to be called idiots, the middle grade imbeciles and the highest grade feeble—minded. (Goddard, 1909).
  18. [18]
    The Rise and Fall of 'Mentally Retarded' - Human Parts - Medium
    they had IQs between 50 and 70. “Imbeciles” with IQs between 25 and 50 were t he second level. Those below ...Responses (43) · Laziness Does Not Exist · When Women Fought For A Seat...Missing: range | Show results with:range<|separator|>
  19. [19]
    [PDF] History of Stigmatizing Names for People with Intellectual ...
    Feb 8, 2023 · Instead, these terms were replaced with "intellectual disability" and ... disability to replace the older term mental retardation. This ...
  20. [20]
    History of Stigmatizing Names for Intellectual Disabilities
    During the 1890s, amentia was used to describe someone born with mental deficiencies. By 1912, ament was a label lumping “idiots, imbeciles, and feeble minded” ...Missing: modern | Show results with:modern<|separator|>
  21. [21]
    [PDF] TWENTIETH-CENTURY DEFINITIONS OF MENTAL RETARDATION
    Allowance was made as well for diagnosing people with IQs up to 10 points above the 70 cutoff as having mental retardation of they also showed marked deficits.
  22. [22]
    Introduction - Mental Retardation - NCBI Bookshelf - NIH
    A five-level classification scheme was also included for borderline (IQ 67-85), mild (IQ 50-66), moderate (IQ 33-49), severe (IQ 16-32), and profound (IQ <16) ...
  23. [23]
    [PDF] story-of-intellectual-disability-timeline.pdf - PA Waiting List Campaign
    What's in a name: The term "mental retardation" is replaced with "intellectual disability" in all federal legislation. 2004. 2010. 1987 Willowbrook closes its ...
  24. [24]
    Clinical Characteristics of Intellectual Disabilities - NCBI - NIH
    DSM-5 defines intellectual disabilities as neurodevelopmental disorders that begin in childhood and are characterized by intellectual difficulties.Missing: feeble- mindedness
  25. [25]
    Intellectual Disability (ID): An Overview from History, Terminology ...
    deficits during the developmental period. Critical components of intelligence proposed in both DSM ... feeble-mindedness. New York: Macmillan. doi:10.1037/10949- ...
  26. [26]
    A-Z Offensive disablist language and origins – UK Disability History ...
    Jul 7, 2016 · Feeble-minded. ORIGIN: The word feeble comes from old French meaning 'lacking strength'. It's meaning was formalised in the Mental Deficiency ...
  27. [27]
    Care And Training Of Feeble-Minded Children (1887)
    Nov 20, 2023 · Whatever may be the most accurate defining term, modern usage is adopting the more popular term, “Feeble-minded,” to include all types or grades ...
  28. [28]
    Idiocy and Childhood Disability in Nineteenth-Century America
    ... feebleminded and linked to the Eugenics movement. While idiocy is often presumed to be the antecedent of intellectual disability, an ana …<|separator|>
  29. [29]
    Idiocy and Childhood Disability in Nineteenth-Century America
    Jun 14, 2024 · The Elm Hill Private Institution for Feeble-Minded Youth, 1848–91. Elm Hill was established in 1848 by Hervey B. Wilbur, an ambitious young ...
  30. [30]
    [PDF] The Kallikak Family: A Study of the Heredity of Feeble-Mindedness
    Jan 1, 2009 · Goddard, Henery Herbert, "The Kallikak Family: A Study of the Heredity of Feeble-Mindedness" (2009). Buck v Bell Documents. 7. https ...
  31. [31]
    A History of Developmental Disabilities | Fear and Suspicion - MN.gov
    So-called "feeblemindedness" was thought to be hereditary, and was eventually blamed for most of society's burdens. Many proponents of eugenics were doctors who ...
  32. [32]
    This Simple Puzzle Test Sealed The Fate Of Immigrants At Ellis Island
    May 17, 2017 · The goal was to weed out the "feeble-minded" and ensure that a "better class" of foreign-born people was ushered into U.S. citizenship. The ...
  33. [33]
    [PDF] History of the Treatment of the Feeble-Minded - Just Security
    Nearly all of the States making provision for the feeble-minded have practically followed what is known as the colony plan of organization; that is, starting ...
  34. [34]
    [PDF] Creating the Back Ward: The Triumph of Custodialism and the Uses ...
    The Syracuse State School for Feeble-Minded Children (established 1852);. 2. The State Custodial Asylum for Feeble-Minded Women (est. at Newark, 1878);. 3 ...
  35. [35]
    Living and Working in the Institution, 1890–1920
    5 The Menace of the Feebleminded: At Century's End: Human Weal or Human Woe? ... Feeble Mind: A History of Intellectual Disability in the United States · James ...
  36. [36]
    [PDF] american institutions for the feeble-minded, 1876-1916
    Thus, the ongoing expansion and reorientation in public education at the beginning of the twentieth century directly impacted institutions for the feeble-minded ...
  37. [37]
    The Public Face of Southern Institutions for the “Feeble-Minded” - jstor
    For newspaper ar- ticles on the importance of establishing state institutions for the feeble-minded, see Raleigh News and Observer, 11 December 1910 and ...
  38. [38]
    [PDF] Institutionalisation: an historical perspective
    Oct 28, 2016 · In this chapter I explore institutions as a social policy 'solution' to the problem of the 'feeble minded' in early twentieth century England, ...
  39. [39]
    Everyday Life and Work: Disabled People in the ... - Historic England
    Society was fearful of the spread of 'feeble-mindedness', a term associated with people with physical, mental and sensory disabilities.
  40. [40]
    The heritability of general cognitive ability increases linearly from ...
    The heritability of general cognitive ability increases significantly and linearly from 41% in childhood (9 years) to 55% in adolescence (12 years) and to 66% ...
  41. [41]
    The Wilson Effect: The Increase in Heritability of IQ With Age
    Aug 7, 2013 · The results show that the heritability of IQ reaches an asymptote at about 0.80 at 18–20 years of age and continuing at that level well into adulthood.
  42. [42]
    IQ differences of identical twins reared apart are significantly ...
    To put this into context, MZ twins raised together typically demonstrate an IQ ICC of ~0.86 (Segal & Russell, 1991), while DZ twins and non-twin siblings raised ...
  43. [43]
    Genetics and intelligence differences: five special findings - Nature
    Sep 16, 2014 · Similar to other complex traits, GCTA heritability estimates for intelligence are about half the heritability estimates from twin studies.
  44. [44]
    The Genetics of Intelligence (24.01.2025)
    Jan 24, 2025 · Genetic factors explain 7-10% of intelligence differences in Europeans, with polygenic scores (PGS) summarizing thousands of genetic variants.
  45. [45]
    Heritability Estimates Versus Large Environmental Effects: The IQ ...
    Evidence from kinship studies showed identical twins separated at birth and raised in different homes grow up with very similar IQs. The fact that they have ...
  46. [46]
    The Paradox of Intelligence: Heritability and Malleability Coexist in ...
    The heritability of intelligence is extremely high, but it can also be malleable, a paradox that has been the source of continuous controversy.
  47. [47]
    The new genetics of intelligence - PMC - PubMed Central
    Meta-analyses of this evidence indicate that inherited differences in DNA sequence account for about half of the variance on measures of intelligence. These ...
  48. [48]
    Alfred Binet and the Binet-Simon Test of Intelligence - Verywell Mind
    Oct 31, 2023 · ... test soon became a means to identify those deemed "feeble-minded" by the eugenics movement.5. Eugenics was the now debunked belief that the ...
  49. [49]
    [PDF] The Eugenic Origins of IQ Testing: Implications for Post-Atkins ...
    The term "eugenics" was coined by English scientist Francis Galton in 1883 ... minded," but also "the daughter of a feeble minded mother in the same ...
  50. [50]
    The measurement of intelligence, 1916. - APA PsycNet
    Terman's revision and extension of Binet and Simon's tests, known as the Stanford-Binet, was the first to have adequate standardization through the school ...Missing: deficiency | Show results with:deficiency
  51. [51]
    Henry Goddard and the feeble-mindedness of Jews, Hungarians ...
    Comments on R. Herrnstein's (1981) criticism of Albee for attributing to H. Goddard (1913, 1917) the statement that "83% of the Jews, 80% of the Hungarians, ...<|separator|>
  52. [52]
    [PDF] Intelligence and IQ testing - PhilArchive
    In North America, “feeblemindedness” was being clinically diagnosed mainly on grounds of teachers' and parents' impressions of a person's abilities. Because ...
  53. [53]
    Eugenic intelligence - Oxford Academic
    A means to measure intelligence and identify feeble-mindedness was central to the policies that eugenics promoted. 'Eugenic intelligence' explains the ...
  54. [54]
    Some historical sources on intelligence testing, eugenics and ...
    Aug 24, 2020 · ... feeble-minded'. Dendy believed that the 'feeble-minded should be ... In Lapage's view, effective methods of dealing with the feebleminded were of ...
  55. [55]
    The Kallikak Family: A Study in the Heredity of Feeble-Mindedness
    The Kallikak family, in the persons of Martin Kallikak Jr. and his descendants, are not open to this argument. They were feeble-minded.<|separator|>
  56. [56]
    The Kallikak family: A study in the heredity of feeble-mindedness.
    On September 15, 1906, the Training School for Backward and Feeble-minded Children at Vineland, New Jersey, opened a laboratory and a Department of Research ...
  57. [57]
    Who Was Deborah Kallikak? - PMC - PubMed Central - NIH
    Apr 15, 2014 · ... minded girl by whom he became the father of a feeble-minded son. ... evidence of the hereditary nature of feeblemindedness and, by ...Missing: heritability | Show results with:heritability
  58. [58]
    Family aggregation of the Intelligence Quotient: understanding its ...
    Sep 1, 2022 · For each family, two values were estimated: the family-IQ, obtained by the mean IQ of the patient and his/her relatives (using the WAIS ...Missing: historical | Show results with:historical
  59. [59]
    Genetic and environmental contributions to IQ in adoptive and ...
    Genetic and environmental sources of variance in IQ were estimated from 486 adoptive and biological families. •. Families include 419 mothers, 201 fathers, ...
  60. [60]
    Behavioral Genetics, Genomics, Intelligence, and Mental Retardation
    Richardson and Koller (1996) demonstrated the powerful interactive impact of familial genetic and environmental influences on low cognitive ability. They ...
  61. [61]
    A History of Developmental Disabilities | Social Reforms - MN.gov
    ... Feeble-minded Youth. James is an industrious man who has been employed as a ... Census Results for Mental Retardation. Year, Number of persons, Percent.
  62. [62]
    Feebleminded - Eugenics Archive
    Stanford-Binet Test, Feeblemindedness · "Exhibit of work and educational ... 5), J.E.W. Wallin's clinical definition of feeble-mindedness · "State Expenses ...Missing: origin | Show results with:origin
  63. [63]
    Sterilization versus segregation: Control of the 'Feebleminded', 1900 ...
    Radford J. P. and Park D. C. A convenient means of riddance: control of the feebleminded in Ontario, 1876–1930. Department of Geography, York University, ...
  64. [64]
    [PDF] Feeble-Minded in Institutions - Census.gov
    Table 1 shows for the feeble-minded, classified by sex, color, nativity, and race, the number enumer- ated in institutions on December 31, 1903, and the number ...Missing: key | Show results with:key
  65. [65]
    [PDF] Distribution of the Feeble-Minded in Society - Scholarly Commons
    The object of this paper is, first, to discuss the relative number of the existing feeble-minded that are at present found in (a) the institu-.Missing: practices | Show results with:practices
  66. [66]
    U.S. Scientists' Role in the Eugenics Movement (1907–1939) - NIH
    The Problem of the Feeble-Minded in Connecticut … the 11,962 feeble-minded persons—the total number who came under the purview of the Survey—have been studied ...
  67. [67]
    Pennhurst Timeline
    (1903 - 1908) The first buildings of the Eastern State Institution for the Feeble-Minded and Epileptic are completed on a site known locally as 'Crab Hill.' The ...
  68. [68]
    Past and Current United States Policies of Forced Sterilization
    Nov 7, 2020 · Frank Hanly of Indiana approved a eugenics law, making Indiana the first state to approve a compulsory eugenic sterilization law. This law made ...Missing: facts | Show results with:facts
  69. [69]
    Eugenics: Compulsory Sterilization in 50 American States
    ... eugenic sterilizations between 1929 and 1939 (Grekul, Jana, Harvey Krahn, and Dave Odynak. 2004. "Sterilizing the 'Feeble-Minded': Eugenics in Alberta, 1929- ...
  70. [70]
    Eugenics and Sterilization · Controlling Heredity - Mizzou Libraries
    Harry Laughlin was a tireless promoter of eugenic sterilization laws and served as a consultant to many states legislatures.Missing: facts | Show results with:facts
  71. [71]
    Buck v. Bell | Oyez
    Carrie Buck was a "feeble minded woman" who was committed to a state mental institution. Her condition had been present in her family for the last three ...
  72. [72]
    Buck v. Bell | 274 U.S. 200 (1927) - Justia U.S. Supreme Court Center
    the Superintendent of the State Colony of Epileptics and Feeble Minded to perform the operation of salpingectomy on Carrie Buck, the plaintiff in error. Page ...
  73. [73]
    The Supreme Court Ruling That Led To 70000 Forced Sterilizations
    Mar 7, 2016 · That's why eugenic sterilization really became the main model that the eugenicists embraced and that many states enacted laws to allow. On ...
  74. [74]
    Eugenic Sterilization in Virginia
    Jul 25, 2023 · Like their beliefs about “feebleminded” people, eugenicists argued that Black and Native peoples had reached the innate limits of their ...Missing: rationale | Show results with:rationale<|control11|><|separator|>
  75. [75]
    Eugenics, sterilization, and historical memory in the United States
    From the 1920s to the 1950s, California sterilized approximately 20,000 people in state homes and hospitals based on a eugenic law that authorized medical ...Abstract · Resumo · Text<|control11|><|separator|>
  76. [76]
    [PDF] Overview of INS History | USCIS
    The general Immigration Act of 1882 levied a head tax of fifty cents on each immigrant and blocked (or excluded) the entry of idiots, lunatics, convicts, and ...
  77. [77]
    [PDF] Opportunity and Exclusion - American Immigration Council
    The Immigration Act of 1907 mandated the exclusion of “imbeciles,” “feeble-minded” persons, individuals afflicted by a physical or mental disability that ...
  78. [78]
    Immigration Act of 1917 (Barred Zone Act)
    aliens. shall be excluded from admission into the United States: All idiots, imbeciles, feeble-minded persons, epileptics, insane persons: persons who have ...
  79. [79]
    You can't keep a bad idea down: Dark history, death, and potential ...
    Dec 17, 2021 · ... feeble-minded' and thus potential for eugenic abuse (A. Cohen, 2016 ... Genetics, eugenics, and the Immigration Restriction Act of 1924.
  80. [80]
    THE JEREMIAH METZGER LECTURE: A BRIEF HISTORY OF ...
    In Chapter V (titled “Migrations and their Eugenic Significance”) of his 1911 book, “Heredity in Relation to Eugenics,” Davenport observes: “The proper way to ...
  81. [81]
    Sterilization Versus Segregation: Control of the 'Feebleminded ...
    Sterilization Versus Segregation: Control of the 'Feebleminded', 1900-1938. Soc Sci Med. 1991;33(4):449-58. doi: 10.1016/0277-9536(91)90327-9. Author. J P ...Missing: 1900-1930 | Show results with:1900-1930
  82. [82]
    Henry Goddard's The Kallikak Family · Controlling Heredity
    Henry Goddard was a prominent and pioneering psychologist and educator in the early twentieth century. From 1906 to 1918 Goddard was the Director of ...
  83. [83]
    The Passing of the Great Race; or The Racial Basis of European ...
    Jul 12, 2021 · In 1916, eugenicist Madison Grant published the book The Passing of the Great Race ... Grant argued that negative eugenics was a more ...
  84. [84]
    America's Hidden History: The Eugenics Movement - Nature
    Sep 18, 2014 · Galton advocated a selective breeding program for humans in his book Hereditary Genius (1869): “Consequently, as it is easy, ….. to obtain by ...
  85. [85]
    [PDF] Buck v. Bell and the Sterilization of Handicapped Persons
    Feb 24, 2022 · In the same year as the Virginia court's decision in Buck v. Bell, the Michigan Supreme Court upheld its sterilization statute in Smith v. Wayne ...
  86. [86]
    What is immoral about eugenics? - PMC - NIH
    It is a “given” in discussions of genetic engineering that no sensible person can be in favour of eugenics. The main reason for this presumption is that so ...
  87. [87]
    The IQ test wars: why screening for intelligence is still so controversial
    Oct 10, 2017 · Supporters of eugenic ideologies in the 1900s used IQ tests to identify “idiots”, “imbeciles”, and the “feebleminded”. These were people ...
  88. [88]
    California's Sterilization Survivors: An Estimate and Call for Redress
    ... society. From 1907 to 1937, 32 US states passed eugenic sterilization laws as part of a larger public health effort to combat degeneracy. Sterilization ...
  89. [89]
    Eugenics and Scientific Racism
    May 18, 2022 · ... eugenic beliefs and ... sterilization. American eugenicists from a variety of disciplines declared certain individuals unfit, “feebleminded ...Missing: rationale feeble-
  90. [90]
    The Cyclical Return of the IQ Controversy: Revisiting the Lessons of ...
    The excesses of the early eugenics movement, despite the idealistic intentions of its founders, show the pitfall of naive hereditarian assumptions. Equally ...
  91. [91]
    Why did Sweden sterilize more than 60,000 people against their will?
    Mar 10, 2024 · Up to 63000 mostly women were sterilized under racial purity program approved by government from 1934-1976, says former special investigator ...
  92. [92]
    The effects of institutionalization on intelligence - ResearchGate
    Aug 9, 2025 · It was found that children who spent over 30% of their lives in an institution scored significantly lower on the Stanford-Binet Intelligence ...
  93. [93]
    The consequences of early institutionalization: can institutions be ...
    Resident children develop poorly physically, mentally, and social-emotionally, but those adopted from institutions display substantial catch-up growth in many ...
  94. [94]
    Institutional Care for the Mentally Defective, 1914–1948: Diversity as ...
    Jan 1, 2007 · It is noteworthy that 2167 of these patients were classed as “feeble-minded” and only 346 of the admissions involved adults aged 21 or older. 58 ...<|control11|><|separator|>
  95. [95]
    an analysis of the psychological and socio-cultural effects - PMC - NIH
    Finally, negative psychological and socio-cultural effects of involuntary sterilisation are long-lasting. ... Psychological long-term effects of sterilization on ...
  96. [96]
    Victims of eugenic sterilisation in Utah: cohort demographics and ...
    ... people sterilised under Utah's coercive, eugenic sterilisation program. We ... In the Name Of Eugenics: Genetics and the Uses of Human Heredity. Alfred ...
  97. [97]
    IQ at age 12 following a history of institutional care - NIH
    They found that adolescents who had been adopted from institutional care demonstrated significant catch-up in cognitive performance, with a mean score of 106 ...
  98. [98]
    Foster care leads to sustained cognitive gains following severe early ...
    Sep 15, 2022 · These findings indicate that early investment in family care as an alternative to institutional care leads to sustained gains in cognitive ability.
  99. [99]
    (PDF) Conflicting Models of Care for People with Mental Disabilities ...
    Aug 10, 2025 · PDF | On Jan 1, 2015, Gillian Ray-Barruel published Conflicting Models of Care for People with Mental Disabilities in Charles Dickens's ...
  100. [100]
    [PDF] The almosts; a study of the feeble-minded - Internet Archive
    The most famous of all Dickens's feeble- minded people is Bamaby ... many of his other feeble-minded characters he shows himself far ahead of such opinion.
  101. [101]
    [PDF] Fashioning a Feeble Mind: Cognitive Disability in American Fiction ...
    May 31, 2017 · Pennsylvania Training School for Feeble-Minded Children, ed., Annual Report of the Pennsylvania Training. School for Feeble-Minded Children ...
  102. [102]
    An excerpt from a pamphlet entitled *Legislation for the Feeble ...
    This pamphlet about legislation available to the “feeble-minded” explains how society, government, and the medical establishment viewed those with mental ...
  103. [103]
    Eugenics in Chicago, 1915: Harry Haiselden, M.D., and The Black ...
    Jul 18, 2023 · Eugenics in Chicago, 1915: Harry Haiselden, M.D., and The Black Stork. Howard Fischer Uppsala, Sweden. Mentally handicapped children at ...
  104. [104]
    American Eugenics, an Inspiration to Hitler
    He even produced the first pro-eugenics propaganda film, The Black Stork, a silent movie that remained in circulation for the next 30 years. In his campaign ...
  105. [105]
    Tomorrow's Children was a 1934 film about a young woman slated ...
    Oct 23, 2018 · As public awareness of eugenic sterilization spread, a controversial Hollywood film opened in theaters. ... feeble-minded family. Who is slated ...
  106. [106]
    musical reactions to the American eugenics movement in Of Mice ...
    Nov 7, 2019 · The eugenics movement also influenced the ways films musically depicted feeble-minded characters. The impact of the eugenics movement on the ...
  107. [107]
    [PDF] A CRITICAL FILM ANALYSIS OF REPRESENTATION OF PEOPLE ...
    the “feeble-minded woman,” were sexual deviants, drunkards, and criminals. ... The moral model of disability seems to be prevalent in horror film from early ...
  108. [108]
    Feebleminded (Short 2015) - IMDb
    ... , Corey Walter Johnson. A documentary about the sterilization and eugenics movement in North Carolina in the 1960s.Missing: depicting | Show results with:depicting
  109. [109]
    Watch The Eugenics Crusade | American Experience - PBS
    Oct 16, 2018 · Latinos and the Consequences of Eugenics. Eugenic beliefs had serious implications for Latinos in California, especially working-class Mexican- ...
  110. [110]
    “Uncle Sam Needs You” or Does He? Intellectual Disabilities and ...
    Dec 1, 2006 · The 1994 film, Forrest Gump, was a moving and humorous portrayal of ... feeble-minded individual who has the intelligence of a child of ...
  111. [111]
    Film Representation and Stigma of Individuals with Intellectual ...
    Nov 20, 2024 · Media representation of individuals with disabilities shapes public perception and understanding of disability. Use of diverse media ...Missing: contemporary | Show results with:contemporary
  112. [112]
    [PDF] Intellectual and Developmental Disabilities - AAIDD
    Media often portrays IDD characters as white and male, with visible disabilities, often bullied, but with strong support and good quality of life.Missing: contemporary | Show results with:contemporary
  113. [113]
    The Menace of the Feebleminded: At Century's End: Human Weal or ...
    In a paper before the American Association for the Study of the Feeble-Minded, he emphasized the protection of the mentally deficient, the same concern ...<|separator|>
  114. [114]
    The Burden Of Feeble-Mindedness": Disability History Museum
    Feeble-minded women are almost invariably immoral, and if at large usually become carriers of venereal disease or give birth to children who are as defective as ...Missing: definition | Show results with:definition
  115. [115]
    The 1840 U.S. Census Was Overly Interested in Americans' Mental ...
    May 15, 2019 · Immigrants and poor people were especially stereotyped as “feeble-minded,” and nativists feared that these demographic groups were reproducing ...
  116. [116]
    [PDF] The Sociopolitical Impact of Eugenics in America
    Eugenics in Nazi Germany eventually progressed to genocide, and after the horrors of the Holocaust became apparent, American eugenicists attempted to distance ...