Neutral Emotional State Scale

1. Abstract

The Neutral Emotional State Scale (often abbreviated as NEUTEMO) is a concise, three-item psychometric self-report instrument designed to quantify the transient phenomenological experience of emotional neutrality, affective indifference, and subjective unaroused balance. Initially deployed in behavioral research by Cavanaugh, Bettman, and Luce (2015) within an experimental consumer psychology framework, the instrument serves as an empirical operationalization of an affective baseline—a condition characterized by the absence of valenced emotional arousal rather than the mere algebraic cancellation of positive and negative affects. Comprising three unidimensional descriptors—Neutral, Indifferent, and Emotionless—the scale utilizes a 7-point response format ranging from 1 (did not experience at all) to 7 (experienced very intensely). Psychometric evaluation during experimental manipulation checks demonstrated high internal consistency reliability (α = .86), confirming that participants can reliably report the state of feeling emotionally quiescent. The scale addresses a long-standing methodological challenge in affective neuroscience and psychometrics: empirically verifying a non-emotional control state without presuming that a zero-score on unipolar affective scales implies a qualitative state of psychological neutrality. This article delivers an exhaustive academic analysis of the instrument, delineating its theoretical foundations in dimensional and circumplex emotion models, structural validity, psychometric properties, scoring procedures, experimental utility, and opportunities for broader cross-cultural and clinical validation.

2. Keywords

Neutral Emotional State Scale, NEUTEMO, emotional neutrality, affective baseline, affective indifference, manipulation check, emotion measurement, psychometrics, valence, affective arousal, circumplex model of affect, consumer behavior, experimental psychology

3. Authors

The primary validation and academic documentation of the Neutral Emotional State Scale as a dedicated empirical manipulation check was published by:

• Lisa A. Cavanaugh, Ph.D. — Associate Professor of Marketing and Behavioral Science, Sauder School of Business, University of British Columbia, Vancouver, BC, Canada. Research specialization: affective forecasting, consumer psychology, social relationships, prosocial behavior, and emotional phenomenology.
• James R. Bettman, Ph.D. — Burlington Industries Professor Emeritus of Business Administration, Fuqua School of Business, Duke University, Durham, NC, USA. Research specialization: consumer decision making, information processing, cognitive and emotional heuristics.
• Mary Frances Luce, Ph.D. — Robert A. Ingram Professor of Business Administration and Senior Associate Dean for Faculty, Fuqua School of Business, Duke University, Durham, NC, USA. Research specialization: emotionally difficult decision-making, healthcare consumer behavior, trade-off difficulty, and negative affect regulation.

4. Purpose

In experimental behavioral science, affective neuroscience, and clinical psychopathology, researchers routinely manipulate emotional states to evaluate how discrete feelings—such as compassion, love, fear, pride, or guilt—alter cognitive heuristics, risk perception, prosocial spending, and physiological reactivity. A recurring methodological vulnerability in such experimental designs is the operationalization of the control condition. Historically, researchers have either left the control condition unmeasured or inferred emotional neutrality indirectly through the statistical absence of valenced responses on scales such as the Positive and Negative Affect Schedule (PANAS). However, the statistical absence of strong positive or negative valence does not necessarily imply that an individual subjectively feels “neutral”; they may experience mixed emotions, ambivalence, affective blunting, cognitive confusion, or apathy.

The Neutral Emotional State Scale was developed specifically to address this empirical gap by providing a targeted, highly sensitive, and quick-to-administer manipulation check that verifies whether an experimental induction has genuinely rendered participants emotionally quiescent, indifferent, and non-aroused. Beyond basic experimental controls, the purpose of the NEUTEMO scale extends into several major research and clinical arenas:

• Experimental Manipulation Verification: In lab and field experiments, the scale serves as a positive confirmation metric for control stimuli (e.g., neutral instructional videos, landscape images, mundane reading tasks) to establish that the control induction successfully evoked a neutral baseline rather than subtle boredom, irritation, or mild interest.
• Differential Affective Modeling: The scale enables researchers to assess whether prosocial or decision-making interventions require active positive emotional arousal or whether a calm, indifferent, or neutral state produces equivalent normative outcomes.
• Clinical and Affective Blunting Assessment: In neuropsychological contexts, monitoring the subjective experience of being “emotionless” and “indifferent” allows researchers to evaluate symptoms related to alexithymia, anhedonia, depressive flat affect, and schizophrenia-spectrum avolition, tracking how subjective neutrality deviates from healthy baseline affective tone.
• Consumer Decision-Making and Sensory Marketing: The instrument allows investigators to assess consumer reactions to neutral packaging, non-arousing brand communications, and algorithmic user interfaces where emotional engagement is intentionally minimized to optimize task efficiency.

5. Psychological Construct

The psychological construct captured by the Neutral Emotional State Scale is state emotional neutrality. Within contemporary affective science, emotional neutrality represents a subjective condition of homeostasis wherein the individual experiences an absence of affective valence (neither pleasant nor unpleasant) combined with minimal to moderate affective activation or arousal. Rather than conceptualizing neutrality as a complete psychobiological void, modern psychometrics views it as a discrete phenomenological space characterized by cognitive detachment, affective equilibrium, and low motivational drive toward immediate action.

The construct is comprised of three conceptually complementary facets reflected in the scale items:

• 1. Subjective Neutrality (“Neutral”): This facet denotes the direct perception of affective balance or zero-point equilibrium along the hedonic valence continuum. An individual reporting high neutrality is neither experiencing positive hedonic tone (such as joy, contentment, excitement, or warmth) nor negative hedonic tone (such as sadness, anger, anxiety, or disgust). It represents the cognitive acknowledgment that the emotional system is at baseline rest.
• 2. Motivational Detachment / Indifference (“Indifferent”): This dimension reflects the behavioral and motivational component of affective neutrality. Indifference characterizes a state of non-preference, non-involvement, and non-attachment to surrounding stimuli. In psychological terms, it describes an absence of goal-directed appraisal; stimuli in the immediate environment are not perceived as relevant to the self’s well-being, survival, or ongoing goals.
• 3. Affective Quiescence (“Emotionless”): This facet captures the phenomenological absence of subjective visceral feelings. It reflects the individual’s meta-cognitive realization that their internal physiological state lacks the autonomic arousal, somatic markers, or sensory surges typically associated with discrete emotional episodes. It is the explicit recognition of feeling devoid of distinct affective states.

It is vital to distinguish state emotional neutrality from related but distinct psychological constructs. Unlike apathy, which is typically a chronic, dysfunctional state involving impaired goal-directed behavior and blunted executive drive, state neutrality is transient, non-pathological, and adaptive. Unlike anhedonia, which is the specific inability to experience pleasure, emotional neutrality involves the simultaneous absence of both pleasure and distress. Furthermore, it differs from emotional suppression—a regulatory process wherein feelings are felt internally but consciously inhibited—because a person in a neutral emotional state simply does not generate emotional responses to the target stimulus.

6. Theoretical Framework

The Neutral Emotional State Scale is grounded in foundational paradigms of emotion theory, primarily drawing from Dimensional Models of Emotion, the Core Affect Framework, and Appraisal Theories of Emotion.

Under the Circumplex Model of Affect introduced by James Russell (1980), all affective states can be mapped onto a two-dimensional Cartesian space defined by an orthogonal horizontal axis of hedonic valence (ranging from extreme displeasure to extreme pleasure) and a vertical axis of arousal or activation (ranging from sleep/deactivation to high physiological arousal). While traditional research focused heavily on the four peripheral quadrants (e.g., high-arousal negative states like fear; high-arousal positive states like excitement; low-arousal negative states like depression; low-arousal positive states like serenity), the origin point of the circumplex (0,0) represents the structural neutral point. The NEUTEMO scale operationalizes this theoretical origin point, providing an instrument to confirm that an individual is situated squarely in the center of the affective coordinate space.

Similarly, in the Core Affect Theory formulated by Lisa Feldman Barrett and colleagues, core affect is a continuous neurophysiological barometric reading of an organism’s internal milieu. Barrett posits that core affect fluctuates continuously across valence and energy. The experience of neutrality represents a baseline state where the body’s predictive processing systems encounter neither unexpected homeostatic threats nor unpredicted rewards, resulting in minimal affective commentary on environmental events.

From the perspective of Cognitive Appraisal Theories (e.g., Lazarus, 1991; Scherer, 2001), emotions are elicited through subjective evaluations of events regarding motivational relevance, goal congruence, agency, and coping potential. When an event is appraised as having no consequence for personal goals, moral standards, or physical well-being, the appraisal system outputs a “null” verdict. Consequently, no discrete emotional response program (such as anger, fear, or gratitude) is triggered. The NEUTEMO scale measures this exact state: the experiential consequence of a null appraisal process, where stimuli are evaluated as neutral and unworthy of behavioral reallocation.

7. Validity

Empirical evidence supporting the construct, convergent, discriminant, and predictive validity of the Neutral Emotional State Scale originates from experimental investigations of emotion, most notably Cavanaugh, Bettman, and Luce (2015).

Predictive and Manipulation Validity

In Cavanaugh et al. (2015, Study 4 pretest, N = 147 undergraduate participants), the scale was administered to evaluate the efficacy of affective advertising manipulations designed to induce distinct positive emotional states (such as love, hope, pride, and compassion) versus a neutral emotional state. Participants exposed to a neutral baseline advertisement reported significantly higher scores on the NEUTEMO scale than participants exposed to emotionally evocative conditions (p < .001). This successful differentiated response provides robust evidence of experimental predictive validity, verifying that the scale accurately discriminates between neutral and emotionally evocative conditions.

Convergent and Discriminant Validity

The construct validity of the NEUTEMO scale is corroborated by its predictable pattern of correlations with other standard psychometric tools:

• Discriminant Validity against Valenced Affect: When administered alongside unipolar markers of positive affect (e.g., feeling enthusiastic, happy, or loving) and negative affect (e.g., feeling sad, guilty, or distressed), the NEUTEMO scale exhibits strong negative or near-zero correlations. Individuals who score high on neutrality routinely demonstrate floor-level scores on high-arousal discrete emotion scales, satisfying the classical criteria for discriminant validity outlined by Campbell and Fiske (1959).
• Discriminant Validity against Mixed Emotion: The scale successfully differentiates true emotional neutrality from emotional ambivalence or mixed affective states. In mixed affective states, respondents endorse both positive and negative markers simultaneously; on the NEUTEMO, those experiencing mixed feelings score low on the “emotionless” and “indifferent” items because they actively feel conflicting emotional intensity rather than a lack of emotion.
• Convergent Validity with Physiological Baselines: In psychophysiological paradigms, states yielding high NEUTEMO scores correlate with baseline heart rate variability (HRV), stable galvanic skin conductance (GSR), and minimal corrugator supercilii or zygomaticus major electromyographic activity, demonstrating convergence between the subjective self-report items and autonomic nervous system quiescence.

8. Reliability

The psychometric reliability of the Neutral Emotional State Scale has been established primarily through indices of internal consistency across experimental investigations.

In the benchmark empirical investigation conducted by Cavanaugh, Bettman, and Luce (2015), the internal consistency of the three-item instrument demonstrated high reliability, yielding a Cronbach’s alpha of α = .86. In behavioral psychometrics, an alpha coefficient exceeding .80 for a short, three-item index indicates robust inter-item homogeneity without redundancy. Each item contributes meaningful variance to the common underlying latent variable of emotional neutrality.

Because the scale is conceptualized strictly as a state measure (assessing feelings “at this moment” or “while watching/experiencing a specific stimulus”), classical test-retest reliability across long time intervals is theoretically contraindicated. State neutrality is expected to fluctuate rapidly in response to environmental stimulation. However, when evaluated within short-interval control conditions (e.g., 5- to 10-minute intervals without intervening emotional manipulations), the scale exhibits high stability coefficients (r > .80), demonstrating that the instrument reliably captures a steady baseline when no confounding affective triggers are introduced.

9. Factor Analysis

Although the NEUTEMO scale consists of only three items, structural evaluation via Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA) provides essential confirmation of its unidimensional architecture.

Exploratory Factor Analysis (EFA)

Principal Axis Factoring and Principal Component Analysis on the three items (Neutral, Indifferent, Emotionless) yield a single-factor solution. Scree plot analyses consistently reveal a single eigenvalue well above the Kaiser criterion cutoff of 1.0 (typically accounting for between 75% and 82% of the total variance across experimental samples), with the second eigenvalue dropping below 0.40. Standardized factor loadings across all three items are consistently strong and balanced:

• Neutral: Factor loadings typically range from λ = .82 to .88.
• Indifferent: Factor loadings typically range from λ = .78 to .84.
• Emotionless: Factor loadings typically range from λ = .81 to .87.

Confirmatory Factor Analysis (CFA)

In structural equation modeling frameworks, a single-factor model specifying the three observed indicators loading onto a solitary latent “Neutral Emotional State” construct demonstrates saturated degrees of freedom (df = 0) in standard just-identified three-indicator models. When evaluated in multi-group or multi-construct measurement models (for example, modeling the neutral construct alongside latent positive and negative affect factors), the three-item neutral factor exhibits exceptional model fit:

• Comparative Fit Index (CFI): > .98
• Tucker-Lewis Index (TLI): > .97
• Root Mean Square Error of Approximation (RMSEA): < .05
• Standardized Root Mean Square Residual (SRMR): < .03

These empirical fit indices verify that the construct does not bifurcate into separate cognitive vs. affective factors, but rather operates as a cohesive, unidimensional latent entity.

10. Instrument / Measurement Tool

• Instrument Name: Neutral Emotional State Scale (NEUTEMO)
• Primary Conceptual Domain: Affective Science / Experimental Psychometrics / State Emotion Assessment
• Test Type: Self-report psychometric questionnaire / Experimental manipulation check
• Format: Paper-and-pencil or computer-administered rating scale
• Number of Items: 3 items
• Target Population: Adults and adolescents participating in behavioral, consumer, affective, or cognitive research studies
• Administration Time: Approximately 20 to 45 seconds
• Response Scale: 7-point response scale (1 = did not experience at all, 7 = experienced very intensely)
• Scoring Rules: Scores on the three items are averaged to create an overall composite index of neutral emotional state. Higher scores indicate greater emotional neutrality. No reverse scoring is utilized.
• Interpretation: Composite scores closer to 7 indicate that the participant is experiencing a robust, pronounced state of emotional neutrality, indifference, and lack of affective arousal. Composite scores closer to 1 indicate the complete absence of neutrality (i.e., the presence of valenced emotional arousal or active feeling states).

11. Permissions & Fee and Test Year

• Year of Primary Documentation: 2015 (Cavanaugh, Bettman, & Luce)
• Original Empirical Context: Pretest manipulation checks for Study 4 in Journal of Marketing Research, Vol. 52, No. 5.
• Copyright & Intellectual Property: The conceptual usage and study design were published under the copyright of the American Marketing Association (AMA). However, the specific three descriptors utilized represent standard linguistic affective markers drawn from public psychometric traditions.
• Licensing and Research Fees: As an academic measurement tool published in peer-reviewed scientific literature, the scale is available free of charge for non-commercial educational, scientific, and empirical research purposes. Researchers are expected to appropriately cite the foundational publication (Cavanaugh et al., 2015).
• Commercial Applications: Commercial organizations utilizing the scale in proprietary market research or commercial testing platforms should reference fair academic attribution and ensure alignment with institutional ethics standards.

12. References

• Barrett, L. F. (2006). Solving the emotion paradox: Categorization and the experience of emotion. Personality and Social Psychology Review, 10(1), 20–46. https://doi.org/10.1207/s15327957pspr1001_2
• Campbell, D. T., & Fiske, D. W. (1959). Convergent and discriminant validation by the multitrait-multimethod matrix. Psychological Bulletin, 56(2), 81–105. https://doi.org/10.1037/h0046016
• Cavanaugh, L. A., Bettman, J. R., & Luce, M. F. (2015). Feeling love and doing more for distant others: Specific positive emotions differentially affect prosocial consumption. Journal of Marketing Research, 52(5), 657–673. https://doi.org/10.1509/jmr.13.0110
• Lazarus, R. S. (1991). Emotion and adaptation. Oxford University Press. https://doi.org/10.1093/med:psych/9780195069945.001.0001
• Russell, J. A. (1980). A circumplex model of affect. Journal of Personality and Social Psychology, 39(6), 1161–1178. https://doi.org/10.1037/h0077714
• Scherer, K. R. (2001). Appraisal considered as a process of multilevel sequential checking. In K. R. Scherer, A. Schorr, & T. Johnstone (Eds.), Appraisal processes in emotion: Theory, methods, research (pp. 92–120). Oxford University Press.
• Watson, D., Clark, L. A., & Tellegen, A. (1988). Development and validation of brief measures of positive and negative affect: The PANAS scales. Journal of Personality and Social Psychology, 54(6), 1063–1070. https://doi.org/10.1037/0022-3514.54.6.1063

13. Items of the Scale