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Differential Emotions Scale

The Differential Emotions Scale (DES) is a self-report psychometric instrument developed by psychologist Carroll E. Izard to measure the intensity of ten discrete fundamental emotions based on his differential emotions theory.^[1] The scale consists of 30 items, with three adjectives per emotion (e.g., "alert," "attentive," and "curious" for interest), rated by respondents on a 5-point Likert scale ranging from "very slightly or not at all" to "very strongly.") The ten emotions assessed are interest, enjoyment, surprise, distress, anger, disgust, contempt, fear, shame, and guilt, reflecting Izard's view of emotions as biologically based, adaptive processes distinct from one another.) Grounded in Izard's foundational work on human emotions, the DES was initially described in his 1977 book Human Emotions and has undergone revisions, including the DES-II (1980s), DES-III (late 1980s), and DES-IV (1990s), to refine item wording and enhance cross-cultural applicability.^[1] The instrument is designed for quick administration, typically taking 5-10 minutes, and yields subscale scores for each emotion by averaging the three corresponding items, allowing researchers to profile emotional patterns rather than global mood states.^[2] It has been widely used in psychological research to examine emotional responses in contexts such as mood induction, personality assessment, and developmental studies.^[2] Empirical evaluations have supported the DES's psychometric properties, with internal consistency reliabilities (Cronbach's alpha) often exceeding 0.70 for most subscales and evidence of construct validity through factor analyses confirming the discreteness of the emotions across diverse samples, including undergraduates and parents.^[2]^[3] A modified version, the Modified Differential Emotions Scale (mDES), developed by Barbara Fredrickson in 2003, focuses on ten positive emotions (e.g., joy, gratitude, pride) using a 0-4 intensity scale over a specified time frame, addressing limitations in capturing broader positive affect for applications in positive psychology and well-being research.^[4]^[5]

Background and Theory

Differential Emotions Theory

Differential Emotions Theory (DET), developed by psychologist Carroll Izard, posits that emotions are discrete, fundamental units of neural activity, each constituting an innately organized program with distinct motivational properties that drive adaptive behavior.^[6] These neural programs are evolutionarily conserved, emerging early in human development and functioning independently yet interactively to promote survival and well-being.^[1] Izard emphasized that emotions are not merely reactions but primary motivators, influencing cognition, perception, and action through their unique patterns of activation.^[7] Central to DET is the integration of three interrelated components in each emotion: specific neuromuscular-expressive patterns, such as facial and postural displays; phenomenological experiences, or the subjective feelings of the emotion; and neuropsychological processes that underpin their elicitation and expression.^[6] For instance, each emotion activates dedicated neural circuits that coordinate these elements, ensuring rapid, patterned responses to environmental stimuli.^[1] This tripartite linkage underscores the theory's view of emotions as holistic systems rather than diffuse states, with expressive behaviors serving as innate signals that are largely universal across cultures.^[8] DET identifies ten fundamental emotions—interest, enjoyment/joy, surprise, distress/sadness, anger, disgust, contempt, fear, shame, and guilt—as the building blocks of emotional life, each evolutionarily adaptive for specific functions like exploration (interest), social bonding (joy), or threat avoidance (fear).^[7] These emotions interact dynamically, forming patterns that modulate one another and interface with cognitive processes to shape personality development and social functioning from infancy onward.^[1] For example, recurrent emotional patterns contribute to trait formation, such as how frequent shame might foster inhibition in social contexts.^[9] Historically, DET evolved from Izard's pioneering research on facial expressions of emotion, which demonstrated cross-cultural recognition of discrete emotional displays, building on Charles Darwin's evolutionary framework and influenced by Paul Ekman's neurocultural theory of 1971 that reconciled biological universals with cultural variations in emotional expression.^[6]^[8] This foundation positioned emotions as primary, innate mechanisms essential for human adaptation and interpersonal relations. The Differential Emotions Scale serves as a key measurement tool derived directly from DET's principles.^[7]

Fundamental Emotions Assessed

The Differential Emotions Scale (DES) assesses ten fundamental emotions posited by Differential Emotions Theory (DET), which views these as discrete, innate, and biologically adaptive patterns of neural activity that motivate specific behaviors and cognitions. These emotions—interest, enjoyment (joy), surprise, distress (sadness), anger, disgust, contempt, fear, shame, and guilt—emerge early in ontogeny and serve distinct evolutionary functions, differing from broader affective states by their specificity and universality across cultures.^[10]^[11] Each emotion is defined by its subjective feeling, facial expression, and motivational component, contributing to adaptive responses in social and environmental contexts:

Interest is a feeling of engagement that motivates attention and exploration, driving learning and cognitive development by directing focus toward novel stimuli.^[12]
Enjoyment (joy) is a positive affective state of pleasure and satisfaction, enhancing social bonds, facilitating creative problem-solving, and down-regulating stress to promote well-being.^[12]
Surprise is a brief orienting response to unexpected events, heightening alertness and preparing the organism for rapid perceptual and behavioral adjustments.^[12]
Distress (sadness) involves a sense of loss or helplessness that prompts withdrawal and signals a need for comfort, motivating social support-seeking to restore equilibrium rather than passive isolation.^[12]
Anger is an energizing emotion of frustration or opposition, mobilizing assertive action against obstacles or injustices to achieve goals through approach behaviors.^[12]
Disgust is a visceral rejection of offensive or contaminated stimuli, functioning to avoid potential harm from toxins, disease, or moral violations by eliciting avoidance.^[12]
Contempt entails a judgment of inferiority or unworthiness in others, maintaining social hierarchies and group cohesion through expressions of disdain that enforce norms.^[12]
Fear is an alarm reaction to perceived threats, promoting survival by triggering flight or freeze responses to evade danger.^[12]
Shame is a self-evaluative emotion arising from perceived personal failure, encouraging conformity to social standards and self-improvement to avoid rejection.^[12]
Guilt involves remorse over moral transgressions, driving reparative actions like apologies or restitution to repair relationships and uphold ethical conduct.^[12]

In DET, these emotions' adaptive roles underscore their evolutionary origins: for instance, interest fosters knowledge acquisition essential for survival, while anger provides the vigor to overcome barriers, ensuring each emotion's unique contribution to motivation and action without redundancy.^[10] Unlike dimensional models, such as those based on valence (pleasure-displeasure) and arousal, which treat emotions as varying points on continuous scales, DET emphasizes their discreteness, innateness, and independence, arguing that emotions are not cognitively constructed but emerge as hardwired systems predating language and cultural influence.^[10]^[11] DET balances positive and negative emotions to reflect their complementary roles in development and functioning, with positive states like interest and joy promoting growth and affiliation alongside negative ones like fear and sadness that signal vulnerabilities and elicit protective responses, thus providing a comprehensive framework for emotional competence.^[11]^[13]

Development and Versions

Historical Development

Carroll Izard’s foundational work on the Differential Emotions Scale (DES) emerged from his research in the early 1970s, which emphasized the universality of discrete emotions through cross-cultural studies of facial expressions. In one key study, participants from the United States, England, France, and Greece independently labeled posed facial expressions of emotions, revealing consistent recognition across cultures and informing the selection of emotion-specific adjectives for the scale. This empirical foundation, drawn from Izard’s broader investigations into innate emotional expressions, ensured that the DES items aligned with fundamental, biologically based emotions identified in diverse populations.^[12] The DES was first published in 1977 as a 30-item self-report measure, with three items per each of ten fundamental emotions, designed to assess discrete emotional experiences based on differential emotions theory (DET). Izard introduced the scale in his book Human Emotions, where it served as a tool to quantify the intensity of individual emotions separately, reflecting DET’s postulate that emotions are distinct neural programs rather than blended states. Throughout the 1980s and 1990s, the DES underwent iterative refinements through pilot testing and psychometric evaluations, primarily with undergraduate samples to enhance item specificity and reduce overlap. A pivotal 1984 study by Gregory J. Boyle administered the scale to 204 undergraduates under various mood-induction conditions, revealing strong discriminant validity for most items but highlighting redundancy in some, which prompted recommendations for adjective broadening and revalidation to improve internal consistency.90124-7) Factor analyses during this period, including those on pilot data from diverse groups, supported the scale’s structure while guiding adjustments for clearer differentiation of emotions.90124-7) By the 1990s, refinements built on DET’s evolution and integrated insights from infant emotion research, where facial coding systems were linked to early emotional differentiation in preverbal children.^[14] This developmental focus, evident in studies like Izard and Malatesta’s 1987 review, reinforced the DES’s applicability across the lifespan by connecting adult self-reports to observable infant expressions.

Key Versions Including DES-IV

The original Differential Emotions Scale (DES), introduced by Carroll E. Izard in 1977, comprises 30 items that assess the subjective intensity of 10 fundamental emotions—interest, joy, surprise, distress, anger, disgust, contempt, fear, shame, and guilt—with three items dedicated to each emotion. This version was specifically designed for evaluating current mood states, providing a brief self-report tool grounded in differential emotions theory to differentiate discrete emotional experiences.^[15] In the 1980s, the DES-II emerged as a refined iteration, incorporating minor wording adjustments to enhance item clarity and facilitate cultural adaptations without altering the core 30-item structure or the focus on the 10 emotions. These changes aimed to improve accessibility across diverse populations while preserving the scale's utility for immediate mood assessment.^[16] The DES-III, developed in the mid-1980s and refined through the 1990s, retained the 30-item format but was adapted for broader age applicability, including children and adolescents, through simplified language and validation in developmental contexts.^[17] This version introduced flexibility in instructional framing to accommodate assessments over varying time periods, such as the past week or general tendencies, expanding its use beyond momentary states.^[18] The DES-IV, formalized in 1993 by Izard and colleagues, marked a significant evolution with 36 items spanning 12 emotions by incorporating shyness and self-hostility alongside the original 10, allowing for three items per emotion.^[19] Intended for wider applications, including pediatric populations, it features specialized variants for distinct recall periods—current (state) feelings, the past week, and lifetime or trait-like experiences—to support longitudinal and situational analyses.^[20] These enhancements stemmed from ongoing research needs to delineate subtle emotional distinctions, such as shame versus shyness, and to integrate newly emphasized negative emotions like self-hostility for a more nuanced representation of affective experiences.^[21]

Structure and Administration

Item Composition and Response Format

The Differential Emotions Scale (DES) employs a standard 30-item format, consisting of three adjectives per each of the ten fundamental emotions to capture discrete emotional experiences.^[1] Representative examples include "happy," "joyful," and "pleased" for the emotion of enjoyment, with similar triads for the other emotions. The selection of these adjectives draws from empirical validation linking self-reported feelings to cross-cultural recognitions of distinct facial expressions for each fundamental emotion. For the original DES, respondents indicate the intensity of experiencing each emotion using a 5-point Likert-type scale ranging from 1 ("very slightly or not at all") to 5 ("very strongly").^[1] This format allows for nuanced assessment of subjective emotional states without requiring complex instructions. The DES supports multiple time frames depending on the research or clinical context, including momentary current feelings, experiences over the past week, or more stable general dispositions.^[22] Later versions, such as the DES-IV, expand to 36 items across 12 subscales (adding shyness and self-hostility to the original ten), maintaining the core structure of three items per emotion while using a frequency-based 5-point scale from 1 ("rarely or never") to 5 ("very often").^[19] For younger populations, adaptations simplify adjective wording and response options to enhance accessibility and comprehension in children as young as five years old.^[23]

Administration and Scoring Procedures

The Differential Emotions Scale (DES) is a self-report questionnaire administered in individual or group settings, requiring approximately 5 to 10 minutes for completion. For the original version, participants receive instructions to rate the intensity of 30 specific feelings or emotions using the 5-point intensity scale. The DES-IV uses 36 items rated for frequency on its 5-point scale. The scale can be given in paper-and-pencil format or digitally, with neutral phrasing to prompt honest responses about emotional experiences over a typical period, such as the past week or general daily life.^[2]^[19] Scoring is straightforward and involves grouping the items into subscales corresponding to each fundamental emotion, with three items per subscale (see "Fundamental Emotions Assessed" for details). For each subscale, the score is computed as the average of the three item ratings (sum divided by 3), yielding a mean value between 1 and 5. This process generates an overall emotion profile consisting of 10 subscale scores in the original DES or 12 in the DES-IV. Calculations can be done manually with simple arithmetic or via basic statistical software like SPSS or Excel, without needing advanced tools.^[2]^[24] Interpretation of the resulting profile focuses on the pattern of subscale scores, where higher means (e.g., above 3.5) suggest a dominant emotion in the individual's typical affective state, while imbalances—such as elevated anger paired with low enjoyment—may highlight potential emotional dysregulation. In research applications, profiles are sometimes compared across individuals or time points using distance metrics like Euclidean distance to quantify similarity. Precautions during administration include promoting cultural sensitivity, particularly for translated versions validated in other languages, and minimizing demand characteristics through anonymous completion and clear, non-leading instructions to ensure accurate self-reporting.^[2]^[25]

Psychometric Properties

Reliability Assessments

The Differential Emotions Scale (DES) exhibits acceptable internal consistency across multiple studies, supporting its use as a reliable measure of discrete emotions. In a foundational validation involving 204 undergraduates exposed to mood-induction procedures, Cronbach's alpha coefficients for the total scale ranged from 0.78 to 0.89 depending on the experimental condition, while subscale alphas varied between 0.56 and 0.88, indicating generally adequate but sometimes modest homogeneity for individual emotions.^[2] Earlier normative data from Izard et al. (1974) reported a mean subscale alpha of 0.81, reinforcing the scale's consistency in non-clinical samples.^[26] A reliability generalization meta-analysis synthesizing 30 independent samples (total N = 2,407 participants, including diverse age groups from children to adults) found a mean Cronbach's alpha of 0.84 for the total DES score, with individual emotion subscales yielding generally high alphas (typically above 0.70).^[23] These estimates highlight the scale's robustness, though variability exists across emotions.^[27] Test-retest reliability for the DES is moderate to good, particularly for trait-like assessments of chronic emotions. Stability is higher for persistent emotions such as guilt than transient ones, though some subscales like interest and guilt exhibited lower consistency across specific conditions.^[26] Factors influencing reliability include sample characteristics, with higher alphas observed in older participants, those from higher socioeconomic backgrounds, and majority ethnic groups; conversely, estimates tend to be lower (below 0.70) in younger, lower-SES, or minority samples, suggesting caution in diverse or clinical populations.^[23] Later versions demonstrate enhanced consistency attributed to refined item selection reducing redundancy.^[28] Cross-validation studies, such as one with 613 mothers of infants, confirmed structural stability through factor analysis, indirectly supporting reliability by replicating the 10 fundamental emotion factors across populations differing from undergraduate norms.^[3] Alternate forms and multi-method applications show moderate inter-rater agreement (correlations around 0.50-0.70) when combining self-reports with observer ratings, though self-report remains the primary mode.^[20] Overall, these assessments affirm the DES's psychometric stability, particularly in non-clinical settings, while underscoring the need for version-specific and population-tailored evaluations. Recent applications as of the 2020s continue to demonstrate stable reliability in diverse contexts, though updated meta-analyses are warranted.^[29]

Validity Evidence

The construct validity of the Differential Emotions Scale (DES) has been supported through factor analytic studies demonstrating alignment with Izard's theory of discrete fundamental emotions. In a cross-validation study involving 613 mothers of infants, factor analysis revealed a structure similar to that observed in 957 high school and college students, indicating the DES effectively discriminates 10 fundamental emotions despite methodological differences in analysis.^[3] Similarly, principal factor analysis of the DES-III in undergraduate samples confirmed the presence of distinct emotion factors, though some subscales showed overlapping items requiring refinement.^[2] These findings, from early psychometric evaluations around 1985, underscore the scale's ability to capture theoretically posited emotion constructs, typically yielding 8-10 factors corresponding to emotions like interest, joy, and anger. Correlations between DES scores and facial expression coding systems, such as Izard's Maximally Discriminative Facial Movement Coding System, further bolster construct validity by linking self-reported emotions to observable expressive behaviors. Convergent validity evidence highlights positive associations between DES subscales and established measures of affect. For instance, the joy subscale of the modified DES (mDES, based on the original DES) demonstrates shared variance in assessing uplifting emotions with measures like the Positive and Negative Affect Schedule (PANAS).^[30] Divergent validity is evident in low or nonsignificant correlations between DES emotion scores and unrelated traits, such as general personality dimensions outside the affective domain, ensuring specificity to discrete emotions.^[2] Criterion validity is demonstrated by the DES's capacity to predict relevant behavioral outcomes. Anger scores from adapted DES forms have been linked to heightened aggression in children, with teacher-reported emotionality showing significant associations (e.g., partial correlations after controlling for covariates) in studies examining emotion processing deficits.^[31] Longitudinal designs further support this, where elevated anger on the DES prospectively relates to aggressive behaviors over time, as explored in analyses of rumination and provocation.^[32] Cross-cultural validity of the DES is well-established in Western samples, including U.S. and European populations, where factor structures replicate reliably.^[3] In non-Western contexts, such as Greek adults using the mDES, the scale maintains strong psychometric properties, with positive emotion subscales aligning with local norms.^[30] Applications in other non-Western groups show variable results attributable to translation challenges and cultural differences in emotional expression.^[33] Key studies affirming the DES structure include early validations like Fuenzalida et al. (1985) and Boyle (1984), alongside later reviews of adapted forms. Developmental validity is particularly robust in pediatric adaptations; for example, the DES for children demonstrates construct alignment in factor analyses of school-age samples, extending to infant assessments via parental reports that predict early emotional patterns. A comprehensive review in the 2010s, building on these, confirms the scale's enduring structural integrity across versions like DES-IV.^[22]

Applications and Extensions

Research and Clinical Applications

The Differential Emotions Scale (DES) has been extensively applied in psychological research to map emotion profiles in personality studies, particularly linking elevated shame to vulnerability for depression. For instance, in a study of 106 depressed women with histories of childhood sexual abuse, higher self-reported shame, guilt, and sadness on the DES-IV were significantly associated with suicidal ideation, even after controlling for depression severity and PTSD symptoms, with odds ratios of 1.13 for shame (p < .05), 1.24 for guilt (p < .001), and 1.41 for sadness (p < .001).^[34] This highlights the scale's utility in identifying discrete negative emotions that contribute to depressive trajectories beyond global affect measures. Similarly, in older primary care patients, DES assessments revealed distinct emotion profiles in major versus minor depression, with major depressives showing elevated sadness and reduced joy and interest compared to controls (p < .05 across nine emotions), underscoring the scale's role in delineating personality-emotion interfaces in affective disorders.^[35] In developmental psychology, the DES facilitates examination of emotion trajectories from infancy onward, often through maternal reports or child self-reports as development allows. A cross-validation study of 613 mothers of infants demonstrated the scale's factor structure aligns with Izard's discrete emotions theory, reliably capturing fundamental emotions like interest and joy in this population, comparable to adolescent norms.^[3] Longitudinal applications, such as Izard's 1990s research supported by the William T. Grant Foundation, integrated DES-derived emotion knowledge measures in Head Start programs, revealing that preschoolers' higher positive emotion expression predicted better third-grade academic and social outcomes (β = .20–.30, p < .01).^[36] These findings illustrate the DES's value in tracking developmental shifts in emotion competence, informing interventions for at-risk children. Clinically, the DES supports assessment of emotion dysregulation in therapeutic contexts, such as cognitive-behavioral therapy (CBT) for anger management, by providing a nuanced profile of discrete emotions like anger and contempt. In mood disorder treatments, it aids monitoring outcomes; for example, in interpersonal psychotherapy trials for depressed women, DES scores tracked reductions in shame and guilt over 36 weeks, correlating with decreased suicidal ideation (r = -.25 to -.35, p < .05).^[34] The scale's integration with Izard's Emotions Course intervention, a preventive program for at-risk youth, enhanced emotion coaching by teachers, leading to improved emotion regulation and reduced externalizing behaviors in randomized trials (effect size d = 0.40, p < .01).^[37] Notable 1990s studies emphasized DES applications in mother-infant interactions, where maternal emotion reports via the scale predicted infant attachment security and socioemotional functioning. For example, higher maternal positive emotions on the DES during early parenting correlated with secure attachments (r = .28, p < .01), informing dyadic interventions.^[38] In autism research, DES scores have been correlated with behavioral observations, revealing blunted positive emotion expression in high-functioning children with autism spectrum disorder compared to neurotypical peers (p < .05), aiding targeted social-emotional training.^[39] The DES's advantages in these domains stem from its brevity—typically 30–36 items—and multidimensional assessment, offering a quick yet detailed view of emotions that surpasses unidimensional mood scales, enabling efficient integration into both research protocols and clinical sessions.^[2]

Modifications and Recent Developments

In 2003, Barbara Fredrickson and colleagues introduced the Modified Differential Emotions Scale (mDES), an adaptation of the original DES that expands the assessment of positive emotions to better align with the broaden-and-build theory of positive emotions.^[40] The mDES consists of 20 items, including 10 positive emotions (such as joy, gratitude, pride, love, hope, amusement, awe, contentment, interest, and sexual desire) and 10 negative emotions, rated on a 0-4 intensity scale over a specified time frame like the past 24 hours or two weeks.^[40] This modification addresses limitations in the original DES by incorporating a broader range of positive emotions to facilitate research on emotional diversity and well-being.^[41] Recent validations of the mDES have confirmed its psychometric robustness in diverse populations. A 2023 study involving 58,810 postmenopausal women aged 50-75 demonstrated good internal consistency for positive affect subscales (Cronbach's α > 0.80) and significant correlations with the Life Orientation Test-Revised (LOT-R) for optimism (r = 0.45-0.52, p < 0.001), supporting its convergent validity in older adults.^[29] Similarly, a 2016 validation in a large Greek sample (N = 11,422 adults aged 18-83) reported satisfactory reliability (α = 0.72-0.89 across subscales) and validity evidence through correlations with well-being measures.^[42] Digital adaptations of the mDES have enabled real-time tracking through app-based ecological momentary assessment (EMA). In meditation research, the mDES has been used for nightly online surveys of emotional experiences, revealing associations between practice frequency and increases in positive emotions.^[43] EMA implementations, such as in positive psychology interventions for breast cancer survivors, use smartphone prompts for mDES responses once daily, enhancing sensitivity to emotional fluctuations with high participant adherence (85%).^[44] Emerging applications of the mDES extend to positive psychology interventions and neuroscience. In intervention studies, the mDES tracks changes in emotional profiles following mindfulness or savoring exercises, showing post-intervention increases in positive-to-negative emotion ratios linked to improved resilience.^[43] These developments fill key gaps in the original DES by emphasizing high-energy positive emotions (e.g., awe and pride) to counter its relative negative bias and support comprehensive well-being assessments.^[41]

Criticisms and Limitations

The Differential Emotions Scale (DES) has faced several criticisms related to its psychometric properties and theoretical foundations. As a self-report measure, it shares common limitations of subjective scales, including potential response biases, social desirability effects, and difficulties in accurately capturing transient emotional states, particularly in populations with limited introspective abilities or language skills.^[45] Some validations have reported deviations from the expected factorial structure. For instance, in a large Greek sample, the modified DES (mDES) yielded a three-factor solution explaining 47.22% of variance, rather than the anticipated two-factor (positive/negative) structure, with items like awe and surprise showing cross-loadings, possibly due to cultural differences. Additionally, reliability assessments in certain studies have relied solely on internal consistency (e.g., Cronbach's alpha) without test-retest evaluations, and criterion validity has been limited to concurrent correlations rather than predictive or longitudinal measures.^[4] The underlying differential emotions theory has been critiqued for assuming discrete emotions from infancy, with empirical challenges including morphological anomalies in infant facial expressions (e.g., MAX-specified anger prototypes not consistently identified as such) and evidence that negative expressions often blend into general distress rather than distinct categories, as seen in judgment studies and eliciting contexts like the visual cliff experiment. These issues question the scale's applicability in developmental research.^[46] Furthermore, the DES's focus on ten specific fundamental emotions may overlook context-specific affects, limiting its utility in applied fields like user experience design where additional emotions (e.g., frustration, satisfaction) are relevant. Cross-cultural adaptations have shown promise but highlight the need for further validation to ensure equivalence.^[45]

References

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Reliability and validity of Izard's Differential Emotions Scale.<|control11|><|separator|>
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Aug 6, 2025 · ... emotions on a 5-point Likert scale (1-Not At All to 5-Extremely). We used the Greek version of the instrument [26] . The Positive Emotions ...<|control11|><|separator|>
[43]
Positive Emotion Correlates of Meditation Practice - NIH
Daily emotional experiences were measured each evening in both studies via the modified Differential Emotions Scale (mDES). The mDES is a 20-item measure that ...
[44]
Feasibility and Acceptability of a Positive Psychological Intervention ...
Oct 7, 2025 · ... Ecological Momentary Assessment (EMA) (397) Breast Cancer (283) ... mDES: Modified Differential Emotions Scale. RQA Results. Table 3 ...<|control11|><|separator|>
[45]
Differential fMRI neural synchrony associated with migraine during ...
Following each film, participants completed the Modified Differential Emotions Scale [16] to assess emotional responses, resulting in a 2–3 min break from ...
[46]
eSEE-d: Emotional State Estimation Based on Eye-Tracking Dataset
... artificial intelligence and the . ... The self-assessment consisted of a 4-word differential emotions scale (DES)—anger, disgust ...