Moral Identity Scale (MIS)

Abstract

The Moral Identity Scale (MIS), developed by Karl Aquino and Americus Reed II in 2002, is the preeminent psychometric instrument used to quantify the self-importance of moral identity in social, organizational, and consumer psychology. Anchored in social cognitive theory, self-schema models, and Blasi’s self-model of moral functioning, the instrument conceptualizes moral identity as a cognitive schema organized around a set of moral trait associations that vary in their subjective centrality to an individual’s overall self-concept. The MIS consists of 10 self-report items evaluated on a 5-point Likert scale, completed immediately following a brief cognitive priming procedure wherein respondents visualize a person embodying nine universal moral virtues: caring, compassionate, fair, friendly, generous, helpful, hardworking, honest, and kind.

Psychometrically, the scale captures two distinct, moderately correlated dimensions (typically exhibiting an inter-factor correlation of r ≈ .35 to .45): Internalization (5 items), which measures the degree to which moral traits are centrally integrated into an individual’s private, internal self-concept; and Symbolization (5 items), which gauges the extent to which moral traits are expressed publicly through overt interpersonal actions, social memberships, and observable behaviors. Extensive psychometric evaluations demonstrate acceptable to excellent internal consistency across diverse populations, with Cronbach’s alpha coefficients consistently falling between .71 and .83 for Internalization, and .71 and .82 for Symbolization. Test-retest reliability across four- to six-week intervals indicates moderate temporal stability for Internalization (r = .49) and high temporal stability for Symbolization (r = .71). Factor analytic studies through both exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) robustly support this two-dimensional orthogonal-to-oblique latent architecture over unidimensional alternatives. The scale demonstrates profound predictive validity, accounting for variance in actual charitable donation, spontaneous volunteering, whistleblowing, corporate ethical leadership, pro-social organizational citizenship behaviors, and reductions in moral disengagement and antisocial transgressions.

Keywords

Moral Identity Scale, Moral Identity, Internalization, Symbolization, Self-Concept, Social Cognitive Theory, Ethical Decision-Making, Prosocial Behavior, Self-Schema, Psychometrics

Authors

The Moral Identity Scale was formulated, validated, and published by Karl Aquino and Americus Reed II in their seminal 2002 publication in the Journal of Personality and Social Psychology.

• Karl Aquino, Ph.D.: Professor of Organizational Behaviour and Human Resources, and the Richard Poon Professor of Organizations and Society at the Sauder School of Business, University of British Columbia, Vancouver, Canada. His research examines organizational justice, moral identity, victimhood, social status, and unethical workplace dynamics.
• Americus Reed II, Ph.D.: The Whitney M. Young, Jr. Professor of Marketing at The Wharton School, University of Pennsylvania, Philadelphia, Pennsylvania, United States. His scholarly expertise focuses on identity-based consumer motivation, self-concept expression via brands, and the psychological mechanisms underpinning value-driven social decisions.

Purpose

For decades, empirical moral psychology was dominated by cognitive-developmental paradigms, most notably those advanced by Lawrence Kohlberg and James Rest. These early models prioritized moral judgment, reasoning sophistication, and abstract justice principles. However, a persistent paradox plagued this literature: the well-documented “moral judgment-action gap.” Possessing sophisticated post-conventional moral reasoning capabilities does not reliably translate into moral, ethical, or altruistic behavior in real-world contexts. Individuals frequently comprehend what is ethically required yet fail to act accordingly.

The Moral Identity Scale was explicitly developed to resolve this theoretical and empirical impasse. Drawing heavily on Augusto Blasi’s pioneering theoretical proposition that moral understanding must be integrated into the core self-concept to possess motivational force, Aquino and Reed (2002) designed the MIS to measure individual differences in the subjective self-importance of moral traits. The fundamental premise of the instrument is that morality functions as an identity construct: when moral values, qualities, and traits constitute a fundamental pillar of how individuals define themselves, the imperative for self-consistency compels them to behave ethically.

In research contexts, the scale serves several critical objectives:

• Predicting Prosocial and Altruistic Action: It differentiates individuals who are intrinsically compelled to engage in real-world helping behaviors (e.g., blood donation, financial philanthropy, volunteering time to stigmatized groups) from those who view morality merely as an abstract philosophical obligation.
• Explaining Ethical and Unethical Conduct in Organizations: In industrial and organizational psychology, the MIS is employed to predict administrative integrity, employee whistleblowing, counterproductive work behaviors (CWBs), self-serving leadership patterns, and resistance to toxic organizational cultures.
• Investigating Consumer and Brand Ethics: In consumer research, the instrument assesses how personal identity drives ethical consumption, boycotts of socially irresponsible firms, and reactions to corporate social responsibility (CSR) initiatives.
• Testing Moderating Mechanisms: The MIS is widely deployed as an essential individual-difference moderator that can override situational pressures (e.g., social loafing, authority obedience, bystander apathy, or financial temptations) that typically induce moral disengagement.

Psychological Construct

The psychological construct operationalized by the MIS is moral identity, defined by Aquino and Reed as a mental self-schema composed of a network of morally relevant traits, goals, and behavioral scripts that is accessible and central to an individual’s self-definition. The authors posit that while virtually all socialized human beings possess some cognitive schema representing moral virtues, people vary substantially in the chronic accessibility and self-importance of that schema. When a schema is chronically accessible, it functions as a lens through which social reality is perceived, categorized, and acted upon.

To ground this abstract construct in concrete cognitive content, Aquino and Reed identified nine core moral characteristics that cross-cultural and developmental literature consistently recognize as classic virtues: caring, compassionate, fair, friendly, generous, helpful, hardworking, honest, and kind. The MIS measures the psychological attachment an individual experiences toward these traits along two distinct structural dimensions:

1. Internalization

The Internalization subscale consists of 5 items that gauge the degree to which moral traits are central, fundamental, and deeply embedded within the private self-concept. An individual with high Internalization perceives being moral not as a role one temporarily inhabits or a performance for external audiences, but as the foundational essence of who they are. For high-internalization individuals, moral considerations possess unconditional psychological priority; behaving immorally induces profound cognitive dissonance, loss of self-respect, and identity distress.

Psychologically, Internalization represents the private, self-reflective core of the construct. It correlates strongly with internalized moral values, authentic empathy, guilt-proneness following transgressions, and spontaneous prosocial action enacted away from public scrutiny. Empirically, normative population samples score exceptionally high on this dimension (often exhibiting means of approximately 4.5 on a 5-point scale), reflecting widespread normative endorsement of moral self-worth.

2. Symbolization

The Symbolization subscale consists of 5 items that assess the degree to which moral traits are overtly projected into the social world through public actions, communicative symbols, lifestyle choices, and group affiliations. It reflects the external, communicative dimension of moral identity—how an individual demonstrates to external observers and to themselves that they embody moral virtues. High symbolizers tend to wear clothing, join social movements, purchase products, or engage in visible community activities that outwardly signify their commitment to ethical standards.

While Symbolization involves external expression, it is not simply superficial impression management. Rather, it represents the socio-behavioral verification of identity: individuals actively construct an external social environment that validates their self-concept. However, empirical findings show that Symbolization correlates more strongly with social desirability concerns, self-monitoring, public self-consciousness, and symbolic social signaling than does Internalization. Mean scores on Symbolization in normative populations are typically moderate (around 3.0 on a 5-point scale), indicating that people generally report high private commitment to morality while exhibiting more selective public signaling.

Theoretical Framework

The Moral Identity Scale is anchored at the intersection of three major theoretical paradigms within contemporary psychological science:

1. Blasi’s Self-Model of Moral Functioning

The primary developmental foundation originates from Augusto Blasi’s (1983, 1984) theoretical “Self-Model.” Blasi contended that cognitive moral judgments alone lack inherent motivational power. To explain moral action, Blasi introduced three mediating constructs: moral judgment, moral identity, and the criterion of self-consistency. Under Blasi’s framework, moral judgments only mandate direct action when the self is implicated. If morality is peripheral to an individual’s self-definition, acting incongruently with ethical principles produces little psychological disruption. Conversely, when moral virtues form the bedrock of self-identity, the psychological need for self-consistency compels the individual to align action with judgment; failing to do so represents a psychological betrayal of the self. Aquino and Reed translated Blasi’s conceptual formulations into an operational psychometric instrument capable of capturing this variation.

2. Social Cognitive Theory of Self-Regulation

Albert Bandura’s (1991, 1999) social cognitive theory provides the regulatory architecture underpinning the MIS. Bandura posits that human agency operates through internal self-regulatory mechanisms, including self-monitoring, judgmental sub-functions, and affective self-reactions. People behave ethically because doing so produces self-respect, pride, and psychological equilibrium, whereas violating internal standards leads to self-condemnation and guilt. Aquino and Reed integrated this mechanism, illustrating how moral identity serves as an internal self-regulatory governor. Furthermore, their model explains how moral disengagement mechanisms—such as euphemistic labeling, displacement of responsibility, and dehumanization—are constrained when moral identity internalization is high, because the threshold for self-regulatory activation is significantly lower.

3. Self-Schema Theory and Identity Verification

Hazel Markus’s (1977) self-schema theory provides the cognitive processing framework for the scale. Self-schemas are cognitive generalizations about the self, derived from past experience, that organize and guide the processing of self-related information. Individuals who are “schematic” for morality (i.e., high in moral identity internalization) spontaneously encode ambiguous everyday situations in ethical terms, retrieve moral knowledge faster from long-term memory, and maintain chronically accessible behavioral scripts for prosocial intervention. Complementing this, William Swann’s self-verification theory and social identity perspectives account for the Symbolization dimension: individuals seek external feedback and engage in public activities to socially authenticate and stabilize their moral self-views.

Validity

The construct, convergent, discriminant, and criterion validity of the Moral Identity Scale have been comprehensively demonstrated in hundreds of empirical studies spanning organizational behavior, developmental psychology, criminology, and marketing.

1. Construct and Convergent Validity

Aquino and Reed (2002) established extensive evidence of convergent validity across five independent studies. Internalization demonstrates robust positive correlations with empathy-related traits, including Davis’s Interpersonal Reactivity Index subscales of Empathic Concern (r ≈ .35 to .42) and Perspective Taking (r ≈ .28 to .38). It also correlates positively with Rest’s Defining Issues Test (DIT-2) measures of post-conventional moral reasoning (P-score), indicating that internalized moral identity aligns with sophisticated cognitive-developmental moral frameworks.

Symbolization exhibits a distinct convergent profile: it correlates moderately with public self-consciousness, self-monitoring (r ≈ .25 to .30), and community civic engagement. While both subscales converge on general prosocial orientations, they diverge predictably regarding social signaling.

2. Discriminant Validity

A central psychometric objective during scale development was proving that moral identity is empirically distinguishable from generic personality traits and response biases:

• Social Desirability Bias: Aquino and Reed (2002) tested the MIS against the Marlowe-Crowne Social Desirability Scale and Paulhus’s Balanced Inventory of Desirable Responding (BIDR). Internalization demonstrated only negligible to weak associations with impression management (r ≈ .05 to .12, often non-significant), confirming that high scores reflect genuine identity investment rather than deliberate “faking good.” Symbolization exhibited a slight, predictable correlation with impression management (r = .26), consistent with its theoretical emphasis on public presentation.
• Five-Factor Model (Big Five): Studies examining the NEO Personality Inventory revealed that while Internalization correlates mildly with Agreeableness (r ≈ .25 to .35) and Conscientiousness (r ≈ .20), it retains substantial unique variance, confirming it is not a mere repackaging of baseline dispositional traits.
• Self-Esteem: The scale showed minimal overlap with Rosenberg’s Self-Esteem Scale (r < .15), proving that valuing moral traits is distinct from generalized self-worth.

3. Criterion and Predictive Validity

The scale’s predictive validity is exceptionally robust:

• Actual Giving and Philanthropy: In laboratory experiments by Aquino and Reed (2002), Internalization directly predicted actual donations of monetary compensation to food banks, participation in canned-food drives, and voluntary commitment of personal time to mentor underprivileged youth.
• In-Group Favoritism vs. Out-Group Justice: Reed and Aquino (2003) demonstrated that individuals with high Internalization expanded their “circle of moral regard” beyond the in-group, expressing greater willingness to provide humanitarian relief to out-group members, even during wartime conditions.
• Organizational Misconduct: In organizational studies, employees high in Internalization show significantly lower rates of workplace theft, expense account fraud, and interpersonal abusive behavior (Detert et al., 2008). Reynolds and Ceranic (2007) showed that moral identity moderates the relationship between moral judgment and moral behavior, confirming Blasi’s theoretical model.
• Meta-Analytic Evidence: A comprehensive meta-analysis by Hertz and Krettenauer (2016) examining 111 independent studies confirmed that moral identity significantly predicts both prosocial behavior (r = .27) and antisocial/delinquent behavior (r = -.22), with Internalization consistently displaying stronger effect sizes than Symbolization for private moral action.

Reliability

The Moral Identity Scale exhibits robust and replicable internal consistency and stability across diverse cultural, demographic, and educational populations.

1. Internal Consistency (Cronbach’s Alpha)

Across the five initial studies conducted by Aquino and Reed (2002), internal consistency estimates regularly met or exceeded classical psychometric benchmarks (≥ .70):

• Internalization Subscale (5 items): Cronbach’s α coefficients ranged from .71 to .83 across initial undergraduate and adult community samples. Subsequent large-scale organizational and international studies have reported alpha coefficients typically clustering between .73 and .85.
• Symbolization Subscale (5 items): Cronbach’s α coefficients ranged from .71 to .82 in developmental samples, with organizational cross-validations routinely observing alphas between .74 and .84.

Composite reliability (CR) indices calculated via structural equation modeling routinely surpass .80 for both latent factors, verifying that measurement error is well-constrained within the item indicators.

2. Test-Retest Stability

Temporal stability was evaluated by Aquino and Reed over a 4- to 6-week test-retest administration window:

• Internalization: Displayed a test-retest reliability coefficient of r = .49 (p < .001). While moderate, this coefficient reflects the theoretical reality that although core self-schemas maintain baseline stability, their momentary cognitive accessibility fluctuates depending on situational cues and self-regulatory state demands.
• Symbolization: Displayed a test-retest reliability coefficient of r = .71 (p < .001), indicating that observable, habituated social communication patterns and symbolic behavioral habits remain highly stable across multi-week periods.

Factor Analysis

The structural dimensionality of the 10-item scale was rigorously evaluated through both Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA).

1. Exploratory Factor Analysis (EFA)

During scale formulation, an initial pool of candidate items was administered to evaluate the latent structure of moral identity self-importance. Principal components and common factor analyses with both varimax (orthogonal) and promax (oblique) rotations repeatedly demonstrated the extraction of a clean two-factor solution based on Kaiser’s eigenvalue-greater-than-1.0 criterion and scree plot inspections:

• Factor 1 (Internalization): Accounted for roughly 25% to 30% of total variance, with all 5 intended items loading cleanly (λ ≥ .55, ranging up to .82) on the latent factor and displaying minimal cross-loadings (≤ .20) on the secondary factor.
• Factor 2 (Symbolization): Accounted for roughly 20% to 25% of the total variance, with all 5 intended items loading cleanly (λ ≥ .50 to .80) and negligible cross-loadings.

2. Confirmatory Factor Analysis (CFA)

Aquino and Reed (2002) tested competitive structural models to substantiate whether the two dimensions should be treated as separate latent constructs rather than a single unified construct:

• Unidimensional Model: A single general moral identity factor loading onto all 10 items consistently yielded poor fit indices (χ²/df > 4.5, CFI < .80, TLI < .75, RMSEA > .11).
• Two-Factor Orthogonal Model: Constraining the covariance between Internalization and Symbolization to zero improved fit over the unidimensional model but remained suboptimal.
• Two-Factor Correlated (Oblique) Model: Allowing the two latent factors to correlate freely (typically exhibiting an inter-factor correlation of r ≈ .35 to .45) produced superior, robust model fit across multiple independent samples: Comparative Fit Index (CFI) ≥ .94 to .97; Tucker-Lewis Index (TLI) ≥ .92 to .95; Root Mean Square Error of Approximation (RMSEA) ≈ .048 to .062; and Standardized Root Mean Square Residual (SRMR) ≤ .055.

Subsequent cross-cultural validation studies (e.g., across North American, European, and Asian cohorts) have demonstrated metric and scalar invariance, supporting the cross-national equivalence of the two-factor architecture.

Instrument / Measurement Tool

• Instrument Name: Moral Identity Scale (MIS)
• Authors: Karl Aquino, Ph.D., and Americus Reed II, Ph.D.
• Year of Development: 2002
• Construct Assessed: Self-importance of moral identity across internal and symbolic domains
• Format: Self-report questionnaire preceded by a standardized trait-visualization induction paragraph
• Administration Procedure: Respondents read a stimulus list of 9 moral virtues (caring, compassionate, fair, friendly, generous, helpful, hardworking, honest, kind) and are instructed to mentally visualize a person possessing these characteristics before responding to the 10 scale statements.
• Total Number of Items: 10 items
  • Internalization Subscale: 5 items (reflecting the internal self-relevance of moral traits; includes reverse-scored items)
  • Symbolization Subscale: 5 items (reflecting public, behavioral, and communicative signaling of moral traits)
• Response Scale: 5-point Likert-type scale ranging from 1 to 5:
  • 1 = Strongly Disagree
  • 2 = Disagree
  • 3 = Neither Agree nor Disagree (Neutral)
  • 4 = Agree
  • 5 = Strongly Agree
• Scoring Protocol:
  • Specific items within the Internalization subscale are negatively worded and require reverse scoring prior to computation (where 1 becomes 5, 2 becomes 4, 3 remains 3, 4 becomes 2, and 5 becomes 1).
  • Subscale scores are calculated separately by computing the arithmetic mean (or sum) of the corresponding 5 items.
  • Because Internalization and Symbolization represent distinct psychological mechanisms with differing behavioral correlates, combining them into a single omnibus total score is discouraged by psychometric experts.
• Administration Time: Approximately 3 to 5 minutes

Permissions & Fee and Test Year

The Moral Identity Scale was originally published in 2002 in the Journal of Personality and Social Psychology, a journal published by the American Psychological Association (APA). The scale was placed into academic scientific literature by authors Karl Aquino and Americus Reed II.

• Academic Research Use: The scale is widely available and free of charge for non-commercial scientific research and educational investigations, provided appropriate citation is given to the original seminal article (Aquino & Reed, 2002).
• Commercial and Organizational Application: Use within proprietary organizational consulting, corporate executive assessments, commercial candidate screening, or for-profit training platforms may require written permission or licensing agreements in accordance with APA copyright policies.
• Original Publication Year: 2002

References

• Aquino, K., & Reed, A., II. (2002). The self-importance of moral identity. Journal of Personality and Social Psychology, 83(6), 1423–1440. https://doi.org/10.1037/0022-3514.83.6.1423
• Bandura, A. (1991). Social cognitive theory of moral thought and action. In W. M. Kurtines & J. L. Gewirtz (Eds.), Handbook of moral behavior and development (Vol. 1, pp. 45–103). Lawrence Erlbaum Associates.
• Bandura, A. (1999). Moral disengagement in the perpetration of inhumanities. Personality and Social Psychology Review, 3(3), 193–209. https://doi.org/10.1207/s15327957pspr0303_3
• Blasi, A. (1983). Moral cognition and moral action: A theoretical perspective. Developmental Review, 3(2), 178–210. https://doi.org/10.1016/0273-2297(83)90029-1
• Blasi, A. (1984). Moral identity: Its role in moral functioning. In W. M. Kurtines & J. L. Gewirtz (Eds.), Morality, moral behavior, and moral development (pp. 128–139). John Wiley & Sons.
• Detert, J. R., Treviño, L. K., & Sweitzer, V. L. (2008). Moral disengagement in ethical decision making: A study of antecedents and outcomes. Journal of Applied Psychology, 93(2), 374–391. https://doi.org/10.1037/0021-9010.93.2.374
• Hertz, S. G., & Krettenauer, T. (2016). Does moral identity effectively predict moral behavior? A meta-analysis. Review of General Psychology, 20(2), 129–140. https://doi.org/10.1037/gpr0000062
• Markus, H. (1977). Self-schemata and processing information about the self. Journal of Personality and Social Psychology, 35(2), 63–78. https://doi.org/10.1037/0022-3514.35.2.63
• Reed, A., II, & Aquino, K. (2003). Moral identity and the expanding circle of moral regard toward out-groups. Journal of Personality and Social Psychology, 84(6), 1270–1286. https://doi.org/10.1037/0022-3514.84.6.1270
• Reynolds, S. J., & Ceranic, T. L. (2007). The effects of moral judgment and moral identity on moral behavior: An empirical examination of the moral individual. Journal of Applied Psychology, 92(6), 1610–1624. https://doi.org/10.1037/0021-9010.92.6.1610

Items of the Scale