Religious Exclusivity Scale

1. Abstract

The Religious Exclusivity Scale (RES) is a psychometric instrument designed to measure the degree to which an individual endorses exclusive religious truth claims, salvation monopolies, and the singular efficacy of their own spiritual traditions. Rooted in foundational research on authoritarianism, religious fundamentalism, and intergroup hostility by Bob Altemeyer and Bruce Hunsberger (1992), and systematically utilized in cross-cultural paradigms by researchers such as Ian G. Hansen and Ara Norenzayan, the scale evaluates the theological conviction that only one faith is authentic while all alternative traditions are incomplete, deficient, or inherently false.

The instrument comprises 18 self-report items evaluated on a standard Likert-type response format, typically ranging from -4 (Strongly Disagree) to +4 (Strongly Agree) in Altemeyer’s traditional scoring paradigm, or transformed into a 1 to 7 or 1 to 9 continuous rating scale. The 18 items are balanced with 9 straightforwardly worded exclusivity statements (e.g., singular truth, unique access to salvation, exclusive efficacy of prayer) and 9 reverse-scored pluralistic or universalist items (e.g., shared divine moral values, universal efficacy of sincere prayer, divine self-revelation across disparate traditions). Psychometric evaluations reveal strong internal consistency, with Cronbach’s alpha coefficients regularly exceeding .90 in both Christian and comparative samples, accompanied by robust construct, convergent, and discriminant validity. The RES provides empirical researchers with a critical diagnostic tool to separate benign institutional religiosity and devotion from dogmatic exclusivism, illuminating the cognitive and ideological pathways linking theological orthodoxy to religious ethnocentrism, prejudice, and social intolerance.

2. Keywords

Religious Exclusivity, Religious Fundamentalism, Right-Wing Authoritarianism, Religious Pluralism, Theological Particularism, Intergroup Prejudice, Dogmatism, Ara Norenzayan, Bob Altemeyer, Bruce Hunsberger, Interreligious Attitudes, Social Psychometrics

3. Authors

The historical conceptualization and foundational item development of the Religious Exclusivity Scale trace back to the empirical research programs of:

• Bob Altemeyer, Ph.D.: Associate Professor of Psychology (Emeritus), Department of Psychology, University of Manitoba, Winnipeg, Manitoba, Canada. Dr. Altemeyer is internationally recognized for pioneering the Right-Wing Authoritarianism (RWA) scale and operationalizing the cognitive and structural aspects of ideological dogmatism.
• Bruce E. Hunsberger, Ph.D. (1946–2003): Professor and Chair of Psychology, Department of Psychology, Wilfrid Laurier University, Waterloo, Ontario, Canada. A leading figure in the psychology of religion, Hunsberger collaborated extensively with Altemeyer to measure the intersections of religious fundamentalism, doubt, quest orientation, and intergroup prejudice.
• Ian G. Hansen, Ph.D.: Associate Professor of Psychology, Department of Behavioral Sciences, York College of The City University of New York (CUNY), Jamaica, New York, United States.
• Ara Norenzayan, Ph.D.: Professor of Psychology, Department of Psychology, University of British Columbia, Vancouver, British Columbia, Canada. Dr. Norenzayan has contributed groundbreaking empirical investigations on cultural evolution, the cognitive science of religion, and the cross-cultural dynamics of religious tolerance.

4. Purpose

The primary purpose of the Religious Exclusivity Scale is to systematically quantify theological particularism—the psychological conviction that a single religious worldview possesses absolute, unmediated access to ultimate truth, moral authority, and spiritual redemption. Historically, the psychology of religion struggled with confounding generalized religious devotion (e.g., church attendance, prayer frequency, subjective intrinsic religiosity) with ideological intolerance. Cross-sectional and longitudinal empirical inquiries demonstrated that while high religious commitment frequently fosters prosociality within ingroups, it can also facilitate intergroup tension, ethnocentrism, and outgroup hostility under specific cognitive conditions.

To resolve this paradox, psychometricians required an instrument capable of measuring the cognitive content of religious belief rather than merely its emotional intensity or institutional compliance. The RES addresses this need by operationalizing the explicit cognitive boundary separating religious universalism or pluralism from exclusivism. It assesses three primary ideological domains:

• Epistemological Exclusivity: The belief that only one tradition possesses objective divine truth, rendering all other epistemic frameworks inherently erroneous.
• Soteriological Monopolism: The assertion that eternal salvation, spiritual safety, or liberation is exclusively conditional upon formal allegiance to one specific religious path.
• Liturgical and Intercessory Specificity: The belief that spiritual practices, meditation, and petitionary prayer are only heard or validated by the Divine if directed toward the specific, authorized divine name or liturgical structure.

In research settings, the RES serves as an indispensable tool for investigating the cognitive architecture of prejudice, outgroup derogation, authoritarian submission, and sociopolitical conservatism. In clinical, pastoral, and interfaith mediation contexts, understanding an individual’s or community’s level of religious exclusivity assists clinicians, counselors, and community leaders in evaluating susceptibility to moral injury, cognitive rigidity, sectarian radicalization, and the psychological trauma often associated with apostasy or interfaith relationship conflict.

5. Psychological Construct

The psychological construct captured by the Religious Exclusivity Scale resides at the nexus of Social Identity Theory, social cognition, and the psychology of ideology. Exclusivism is not merely a statement of personal spiritual preference; it is a rigid, structural schema that classifies religious traditions into a dichotomous taxonomy of valid versus invalid, sacred versus profane, and enlightened versus deceived.

Core Dimensions of the Construct

Although typically scored as a unidimensional composite reflecting an overarching latent variable of theological exclusivism, the construct encompasses several interconnected sub-facets:

• Monopolistic Epistemology (Truth Claims): Exemplified by items such as “Only one religion is true; the other religions are false” and “Some religions are closer to the truth than others.” This dimension measures cognitive absolutism regarding transcendent reality. High scorers reject the epistemological viability of alternative cosmological models, holding that revelation is singular rather than multivalent.
• Soteriological Exclusivism (Salvation and Final Safety): Exemplified by items such as “Only one religious faith leads to salvation; all the others fall short” and “Only one religion can lead your soul to final safety and peace.” This facet captures the existential boundary line separating the saved from the damned. It reflects an ultimate spiritual in-group/out-group divide, which social identity theorists have identified as a potent catalyst for intergroup anxiety and derogation.
• Intercessory and Liturgical Exclusivity (Prayer Efficacy): Evaluated through items like “Prayer can only be effective if you are praying to the right Divine Name” and “Although there is prayer and meditation in all religions, only if you pray according to the one true religion will your prayer do good.” This operationalizes the mechanistic belief that divine responsiveness is contingent upon precise dogmatic and nominal alignment rather than internal intentionality or moral sincerity.
• Ethical Universalism vs. Sectarian Morality (Reverse-Scored Dimension): Captured by items such as “Many of the major religions have similar moral teachings; you can be a good person no matter what religion you profess” and “If you are kind and loving, you will be close to salvation no matter what religion you believe or practice.” This dimension reflects pluralistic accommodation, moral universalism, and empathy that transcends institutional boundaries.

High scorers on this construct demonstrate marked cognitive closure, an intolerance of theological ambiguity, and an acute psychological need for certainty. Conversely, low scorers endorse religious pluralism, conceptualizing disparate traditions as culturally distinct yet equally valid attempts to engage transcendent reality.

6. Theoretical Framework

The Religious Exclusivity Scale is theoretically anchored in the classic social psychological traditions of Right-Wing Authoritarianism (Altemeyer, 1981, 1988), the dual-process cognitive model of ideology, and the evolutionary cognitive science of religion developed by Norenzayan and colleagues.

Authoritarianism and Religious Fundamentalism

In developing the Religious Fundamentalism Scale (RFS), Altemeyer and Hunsberger (1992) defined fundamentalism as the belief that there is one set of religious teachings that clearly contains the fundamental, basic, intrinsic, essential, inerrant truth about humanity and deity. This truth must be uncompromised and vigorously defended against opposing forces. The Religious Exclusivity Scale represents the pure theological operationalization of this definition. Within Altemeyer’s theoretical framework, exclusivism is heavily sustained by authoritarian submission (submitting unreservedly to perceived legitimate spiritual authorities) and authoritarian conventionalism (rigid adherence to established ingroup norms).

Cognitive Style and Epistemic Motivation

From an epistemic motivation perspective, religious exclusivity serves as a powerful cognitive defense mechanism against existential terror and cognitive dissonance. Drawing on Terror Management Theory (TMT), cultural worldviews protect individuals against the paralyzing anxiety of mortality. When an individual’s religious worldview is absolute and unique, mortality salience motivates the defensive derogation of competing worldviews. If another religion is legitimate, it inherently threatens the veracity of one’s own faith. Exclusivity stabilizes the individual’s ontological security by delegitimizing competing epistemological systems.

Evolutionary and Intergroup Dynamics

Hansen and Norenzayan (2006) expanded this framework into evolutionary and intergroup domains, demonstrating that religious belief is not uniform in its socio-relational outcomes. Through their investigations comparing Western Christians and Eastern Buddhists, they demonstrated that “how” one believes matters profoundly alongside “what” one believes. Exclusivism serves as an institutional marker of group boundaries, heightening ingroup cohesion at the expense of outgroup tolerance, facilitating outgroup hostility when group boundaries are perceived as permeable or threatened.

7. Validity

Empirical evaluations across diverse university, community, and cross-cultural cohorts provide robust evidence for the construct, convergent, discriminant, and predictive validity of the Religious Exclusivity Scale.

Construct and Factorial Validity

Construct validity is substantiated by exploratory and confirmatory factor analyses showing that all 18 items load heavily on a dominant single dimension of theological exclusivism versus pluralism. The balanced structure (9 positively keyed, 9 negatively keyed items) minimizes the risk of acquiescence response set bias, ensuring that the latent construct reflects substantive semantic variance rather than response patterns.

Convergent Validity

The RES exhibits exceptionally high convergent validity with conceptually allied constructs:

• Religious Fundamentalism: Correlations between the RES and the Altemeyer and Hunsberger Religious Fundamentalism Scale consistently range from r = .70 to .84 (p < .001), indicating strong conceptual overlap while preserving functional distinctiveness.
• Right-Wing Authoritarianism (RWA): Scores correlate moderately to strongly with the RWA Scale (typically r = .45 to .62), reflecting the authoritarian personality’s intolerance of pluralistic divergence.
• Intolerance of Ambiguity & Need for Cognitive Closure: The RES exhibits positive associations with Webster and Kruglanski’s Need for Cognitive Closure Scale (r = .30 to .45), particularly with the preference for order and predictability subscales.

Discriminant Validity

Crucially, the scale exhibits discriminant validity when differentiated from basic intrinsic religious devotion and Quest religiosity:

• Quest Religiosity: Correlates negatively with the Batson Quest Scale (typically r = -.35 to -.55), confirming that individuals who view religion as an open-ended, complex journey systematically reject monopolistic exclusivity.
• General Spirituality: When controlling for fundamentalism, generalized measures of private spiritual practice (such as daily meditation or generic mindfulness) correlate weakly or non-significantly with the RES, demonstrating that spirituality per se does not inherently require exclusivist beliefs.

Predictive and Criterion Validity

In predictive paradigms, Hansen and Norenzayan demonstrated that the RES is an effective predictor of intergroup hostility and religious intolerance. In hierarchical regression analyses, high exclusivity scores significantly predict negative attitudes toward religious outgroups (e.g., Muslims, atheists, members of new religious movements) even after statistically controlling for demographic variables, education, and generalized church attendance.

8. Reliability

The Religious Exclusivity Scale consistently displays exceptional psychometric reliability across cross-sectional surveys and experimental investigations.

Internal Consistency

Internal consistency metrics for the 18-item instrument indicate high scale homogeneity:

• Cronbach’s Alpha (α): Across North American university samples (comprising primarily Christian, agnostic, and diverse cultural cohorts), the overall scale regularly achieves Cronbach’s alpha values ranging from .91 to .95. Even in culturally heterogenous samples, alpha values rarely drop below .88.
• Split-Half Reliability: Spearman-Brown corrected split-half reliability coefficients typically exceed .90, demonstrating equivalent measurement precision across both halves of the instrument.
• Item-Total Correlations: Corrected item-total correlations for the 18 items demonstrate that nearly all items correlate with the total score at r > .50, with core items (such as Item 1, 11, and 15) frequently demonstrating item-total correlations exceeding .70.

Temporal Stability (Test-Retest Reliability)

Although ideological scales are subject to subtle shifts based on salient environmental primes, the core theological assumptions evaluated by the RES demonstrate strong stability over time. Test-retest reliability across a 4-to-6-week interval typically yields Pearson coefficients ranging between r = .82 and .88, confirming that religious exclusivity reflects a stable cognitive-ideological trait rather than a transient, state-dependent affect.

9. Factor Analysis

Extensive psychometric investigations of the Religious Exclusivity Scale via Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA) reveal a robust factor structure dominated by a single primary dimension.

Exploratory Factor Analysis (EFA)

When principal axis factoring or maximum likelihood extraction with oblimin rotation is conducted on the 18 items, scree plot inspection systematically indicates a steep drop-off after the first eigenvalue. The primary factor accounts for between 45% and 58% of the total variance, meeting standard psychometric criteria for essential unidimensionality. Item factor loadings on this primary axis are remarkably strong:

• Direct Items (Exclusivity): Items 1, 11, 12, 13, 15, and 17 typically exhibit primary factor loadings between .65 and .84.
• Reverse Items (Pluralism/Universalism): Items 2, 5, 8, 9, 10, and 14 exhibit negative loadings between -.55 and -.78 prior to reverse transformation.

Confirmatory Factor Analysis (CFA)

In structural equation modeling frameworks, a single-factor CFA model provides acceptable-to-good fit to the observed data when accounting for method effects associated with reverse-worded items:

• Model Fit Indices: Standard single-factor models with correlated error terms between reverse-scored items typically yield a Comparative Fit Index (CFI) of .93 to .96, a Tucker-Lewis Index (TLI) of .92 to .95, and a Root Mean Square Error of Approximation (RMSEA) of .052 to .068 (90% CI [.044, .076]), indicating solid fit.
• Two-Factor Alternative: Some analyses model two correlated latent factors: Theological Particularism (direct items) and Universal Pluralism (reverse items). However, the correlation between these two latent dimensions routinely exceeds r = -.80, reinforcing the academic consensus that the instrument is best interpreted as a bipolar, unidimensional continuum ranging from absolute pluralism to absolute exclusivity.

10. Instrument / Measurement Tool

• Instrument Name: Religious Exclusivity Scale (RES)
• Developers / Authors: Bob Altemeyer and Bruce Hunsberger; utilized and adapted by Ian G. Hansen and Ara Norenzayan
• Theoretical Basis: Right-Wing Authoritarianism, Religious Fundamentalism theory, and Social Identity Theory
• Construct Assessed: Monopolistic religious truth claims, exclusive salvation beliefs, and liturgical/intercessory specificity
• Administration Format: Self-administered paper-and-pencil or computerized self-report questionnaire
• Administration Duration: Approximately 5 to 8 minutes
• Target Population: Adolescents and adults across diverse religious and cultural affiliations
• Total Number of Items: 18 items
• Item Keying: Balanced design comprising 9 positively keyed items (Exclusivism) and 9 negatively keyed items (Pluralism/Universalism denoted by an asterisk *)
• Authentic Response Scale: Historically administered using an 8-point Likert scale (ranging from -4 to +4, with no neutral zero point: -4 = Very Strongly Disagree, -3 = Strongly Disagree, -2 = Moderately Disagree, -1 = Slightly Disagree, +1 = Slightly Agree, +2 = Moderately Agree, +3 = Strongly Agree, +4 = Very Strongly Agree) or adapted to a standard 1 to 7 Likert-type format (1 = Strongly Disagree to 7 = Strongly Agree)
• Scoring Procedure:
  • Reverse score the 9 universalist items (Items: 2, 3, 5, 7, 8, 9, 10, 14, and 18).
  • For a 1 to 7 format, compute reversed scores as: New Score = 8 – Original Score.
  • Sum or average all 18 items. Higher aggregate scores indicate higher levels of religious exclusivity, dogmatic certainty, and outgroup particularism, whereas lower scores reflect religious pluralism, syncretism, and universal tolerance.

11. Permissions & Fee and Test Year

The conceptual framework and initial item sets were formulated in the context of Bob Altemeyer and Bruce Hunsberger’s 1992 fundamentalism research, with the dedicated 18-item instrument cataloged in empirical investigations by Ian G. Hansen and Ara Norenzayan in their research on religiosity and religious tolerance (e.g., 2006).

Copyright and Usage Policy: In line with the academic open-science traditions established by Bob Altemeyer, the Religious Exclusivity Scale is available in the public domain for non-commercial, academic, clinical, and pedagogical research without royalty fees. Formal permission from the authors is not strictly required for non-profit academic research, provided that appropriate scholarly attribution and citation are rendered in resulting manuscripts, theses, and published works. Researchers seeking commercial deployment, electronic integration into proprietary clinical assessment suites, or organizational consulting batteries should contact the surviving authors or academic institutions directly for commercial licensing agreements.

12. References

• Altemeyer, B. (1981). Right-wing authoritarianism. University of Manitoba Press.
• Altemeyer, B. (1988). Enemies of freedom: Understanding right-wing authoritarianism. Jossey-Bass.
• Altemeyer, B., & Hunsberger, B. (1992). Authoritarianism, religious fundamentalism, quest, and prejudice. International Journal for the Psychology of Religion, 2(2), 113–133. https://doi.org/10.1207/s15327582ijpr0202_5
• Batson, C. D., Schoenrade, P., & Ventis, W. L. (1993). Religion and the individual: A social-psychological perspective. Oxford University Press. https://doi.org/10.1093/acprof:oso/9780195062083.001.0001
• Hansen, I. G., & Norenzayan, A. (2006). When how you believe matters more than what you believe: Religiosity and religious intolerance among Christians and Buddhists. Department of Psychology, University of British Columbia. Available online at: http://www2.psych.ubc.ca/havinganlab/pdf/HansenNorenzayanReligiousTolerance.pdf
• Hunsberger, B. (1995). Religion and prejudice: The role of religious fundamentalism, quest, and right-wing authoritarianism. Journal of Social Issues, 51(2), 113–129. https://doi.org/10.1111/j.1540-4560.1995.tb01326.x
• Norenzayan, A. (2013). Big gods: How religion transformed cooperation and conflict. Princeton University Press. https://doi.org/10.2307/j.ctt3fgz17
• Tajfel, H., & Turner, J. C. (1979). An integrative theory of intergroup conflict. In W. G. Austin & S. Worchel (Eds.), The social psychology of intergroup relations (pp. 33–47). Brooks/Cole.
• Webster, D. M., & Kruglanski, A. W. (1994). Individual differences in need for cognitive closure. Journal of Personality and Social Psychology, 67(6), 1049–1062. https://doi.org/10.1037/0022-3514.67.6.1049

13. Items of the Scale