Tolerance for Ambiguity Scale (TAS)

Abstract

The Tolerance for Ambiguity Scale (TAS), developed and refined by Jeffrey L. Herman, Michael J. Stevens, Allan Bird, Mark E. Mendenhall, and Gary Oddou (2010), is a psychometrically robust, multidimensional instrument designed to measure an individual’s cognitive and behavioral orientation toward uncertain, novel, complex, and insoluble stimuli. Building upon foundational psychometric work by Stanley Budner (1962), this modernized 12-item scale addresses long-standing conceptual ambiguities and statistical weaknesses prevalent in earlier instruments. Evaluated using a 5-point Likert response format ranging from 1 (“Strongly Disagree”) to 5 (“Strongly Agree”), the TAS captures four distinct yet intercorrelated dimensions: Valuing Diverse Others, Coping with Change, Embracing Challenging Perspectives, and Tolerance for Unfamiliarity. Across independent samples in cross-cultural organizational psychology, expatriate adaptation, and international management, the instrument demonstrates solid construct validity, convergent validity with cognitive flexibility and openness to experience, discriminant validity against social desirability and generalized anxiety, and reliable internal consistency estimates across dimensions. This article provides a comprehensive academic review of the scale’s historical development, theoretical architecture, latent psychometric structure, validation metrics, diagnostic applications, and normative scoring procedures.

Keywords

Tolerance for Ambiguity Scale, TAS, ambiguity tolerance, cognitive flexibility, cross-cultural adjustment, psychometrics, Jeffrey L. Herman, Stanley Budner, international management, uncertainty avoidance, expatriate effectiveness

Authors

The refined 12-item Tolerance for Ambiguity Scale (TAS) was conceptualized, operationalized, and validated by an international consortium of organizational psychologists and cross-cultural management scholars:

• Jeffrey L. Herman, Ph.D. — Department of Psychology, George Mason University; specialist in expatriate cross-cultural coping strategies, employee repatriation adjustment, and quantitative psychometrics.
• Michael J. Stevens, Ph.D. — Department of Management, John M. Huntsman School of Business, Utah State University; international human resource management scholar, renowned for work on interpersonal teamwork and global competencies.
• Allan Bird, Ph.D. — Department of International Business, D’Amore-McKim School of Business, Northeastern University; internationally recognized expert in global leadership development, cross-cultural competence, and international executive assessment.
• Mark E. Mendenhall, Ph.D. — J. Burton Frierson Chair of Excellence in Business Leadership, College of Business, University of Tennessee at Chattanooga; leading scholar in expatriate adjustment and global leadership dynamics.
• Gary Oddou, Ph.D. — College of Business Administration, California State University San Marcos; pioneer in international assignment repatriation and global knowledge transfer.

The intellectual heritage of the scale also builds directly upon the classic unidimensional formulation by Stanley Budner (1962), who originally defined intolerance of ambiguity as the tendency to perceive ambiguous situations as sources of psychological threat.

Purpose

The primary purpose of the Tolerance for Ambiguity Scale (TAS) is to provide researchers, industrial-organizational psychologists, clinical evaluators, and cross-cultural trainers with a parsimonious, psychometrically sound assessment of how individuals perceive, interpret, and respond to ambiguous scenarios. Ambiguity is an omnipresent condition characterized by incomplete information, multiple plausible interpretations, shifting probabilities, unfamiliar environments, and contradictory cues. Individuals with low tolerance for ambiguity tend to experience psychological distress, premature cognitive closure, behavioral rigidity, and cognitive avoidance when confronted with ill-defined stimuli. Conversely, individuals exhibiting high tolerance view ambiguous contexts as intellectually stimulating, growth-oriented, and navigable opportunities.

Historically, early psychometric scales designed to measure ambiguity tolerance—such as those by Else Frenkel-Brunswik (1949), Stanley Budner (1962), and Walter MacDonald (1970)—suffered from notable psychometric limitations, including poor internal consistency reliability (often exhibiting Cronbach’s alphas below .60), conflation of distinct theoretical sub-facets into an unstable single score, and an overreliance on dated sociocultural idioms. Herman et al. (2010) specifically engineered the TAS to overcome these empirical deficiencies, tailoring the construct for modern global contexts, international mobility, complex decision-making, and diverse organizational structures.

In applied organizational and clinical environments, the TAS serves critical assessment functions:

• Expatriate Selection and Global Leadership: Identifying employees capable of functioning autonomously in foreign cultural environments where normative social scripts and expectations are non-linear or poorly articulated.
• Executive and Strategic Decision-Making: Evaluating managerial propensity to navigate market volatility, strategic inflection points, and disruptive technological changes without prematurely imposing oversimplified solutions.
• Clinical and Counseling Diagnostic Support: Assessing rigid cognitive schemas and intolerance of uncertainty, which represent transdiagnostic maintenance mechanisms in generalized anxiety disorder, obsessive-compulsive traits, and depressive ruminative cycles.
• Educational and Training Interventions: Measuring the longitudinal impact of cross-cultural training, international study-abroad programs, and problem-based pedagogical methods on students’ cognitive resilience and perspective-taking.

Psychological Construct

The psychological construct of tolerance for ambiguity encompasses cognitive, affective, and behavioral tendencies. At its core, it designates the degree to which an individual accepts, manages, and adapts to information that cannot be adequately structured or categorized by existing cognitive schemata. In the refined structural model validated by Herman et al. (2010), ambiguity tolerance is modeled as a multidimensional construct comprising four foundational dimensions:

1. Valuing Diverse Others

This dimension evaluates an individual’s openness, psychological comfort, and active appreciation when interacting with people who possess differing worldviews, ideological tenets, cultural customs, and socio-ethical values. Low scorers perceive value discrepancies as interpersonal threats, leading to social homophily, xenophobia, and prejudice (e.g., endorsed by Item 1: “I avoid settings where people don’t share my values”, and Item 5: “The sooner we all acquire similar values and ideals the better”). High scorers, by contrast, find social heterophily intellectually stimulating and socially enriching (e.g., Item 2: “I can enjoy being with people whose values are very different from mine”, and Item 6: “I can be comfortable with nearly all kinds of people”). This dimension directly reflects the socio-cognitive facet of ambiguity tolerance within multicultural ecosystems.

2. Coping with Change

This sub-facet targets an individual’s affective reaction to environmental instability, occupational dynamism, and the absence of immutable operational routines. Ambiguity-intolerant individuals express a distinct preference for static, highly structured work and life conditions where variance is systematically minimized (e.g., Item 9: “A good job is one where what is to be done and how it is to be done are always clear”, and Item 10: “A person who leads an even, regular life in which few surprises or unexpected happenings arise really has a lot to be grateful for”). Those high on this dimension tolerate or even thrive on organic, evolving task environments where procedural improvisation is required.

3. Embracing Challenging Perspectives

This facet assesses intellectual curiosity, epistemological humility, and the willingness to question personal assumptions and deeply held epistemological models. It reflects cognitive flexibility and the enjoyment of epistemic disequilibrium. Individuals with elevated tolerance on this dimension embrace situations where established heuristics are interrogated and cognitive paradigms are shaken (e.g., Item 8: “A good teacher is one who makes you wonder about your way of looking at things”). This stands in direct contrast to dogmatism, where contradictory ideas generate immediate cognitive defense mechanisms and rejection.

4. Tolerance for Unfamiliarity

This behavioral and experiential dimension captures an individual’s willingness to engage with novel, culturally distant, or unfamiliar physical and social environments. Low scorers experience substantial neophobia, seeking the psychological security of familiar surroundings and known peer groups (e.g., Item 4: “I like to surround myself with things that are familiar to me”, Item 11: “What we are used to is always preferable to what is unfamiliar”, and Item 12: “I like parties where I know most of the people more than ones where all or most of the people are complete strangers”). High scorers demonstrate neophilia and experiential novelty-seeking, preferring to immerse themselves in unknown settings (e.g., Item 3: “I would like to live in a foreign country for a while”, and Item 7: “If given a choice, I will usually visit a foreign country rather than vacation at home”).

Theoretical Framework

The theoretical framework underlying the Tolerance for Ambiguity Scale synthesizes principles from cognitive psychology, social-personality theory, and cross-cultural communication models. The construct traces its lineage back to Else Frenkel-Brunswik’s (1949) pioneering studies on the authoritarian personality at UC Berkeley. Frenkel-Brunswik hypothesized that intolerance of ambiguity constituted a pervasive emotional and perceptual personality variable characterized by black-and-white thinking, rapid closure, rigid categorization, and the inability to withstand ambivalent emotions or ambiguous cognitive states.

In 1962, Stanley Budner advanced the conceptual framework by operationalizing ambiguity as situations marked by three primary conditions:

• Novelty: Situations presenting complex cues that have no recognizable historical precedent for the individual.
• Complexity: Situations containing an overwhelming volume of interconnected information that exceeds immediate working cognitive capacity.
• Insolubility: Situations where contradictory cues prevent the emergence of an obvious, singular correct resolution.

Budner conceptualized intolerance of ambiguity as the tendency to perceive novelty, complexity, and insolubility as psychological threats, whereas tolerance was defined as the tendency to perceive those exact characteristics as desirable or neutral challenges. Threat appraisals typically evoke phenomenological anxiety, followed by defensive cognitive reactions such as repressing ambiguous cues, premature jumping to conclusions, stereotyping, and behavioral avoidance.

Herman, Stevens, Bird, Mendenhall, and Oddou (2010) integrated Budner’s taxonomy with contemporary cognitive appraisal theory (Lazarus & Folkman, 1984) and Hofstede’s cross-cultural uncertainty avoidance paradigm. Herman et al. postulated that within global and multicultural contexts, ambiguity is not merely an abstract perceptual puzzle, but an ongoing experiential reality that manifests in human interactions, shifting organizational routines, diverse perspectives, and alien cultural customs. Consequently, the TAS reformulates ambiguity tolerance from a monolithic personality trait into an active, multidimensional cognitive orientation that influences how individuals process cultural variance, adapt to unexpected environmental shifts, and regulate emotional distress in unpredictable settings.

Validity

Empirical validation of the 12-item Tolerance for Ambiguity Scale has been conducted across diverse international, occupational, and academic cohorts, providing solid evidence for its construct, convergent, discriminant, and criterion-related validity.

Construct Validity

Construct validity is substantiated through both exploratory and confirmatory factor analytic models. Herman et al. (2010) demonstrated that the four-factor latent model (Valuing Diverse Others, Coping with Change, Challenging Perspectives, and Tolerance for Unfamiliarity) fit empirical data significantly better than competing unidimensional or orthogonal two-factor specifications. The four factors load cohesively onto a higher-order latent construct of general ambiguity tolerance, confirming that the subscales capture distinct facets of a unified psychological domain.

Convergent Validity

The TAS exhibits statistically significant, theoretically aligned correlations with validated psychological constructs:

• Openness to Experience: Positively correlated with the Openness to Experience domain of the NEO-PI-R (coefficients typically ranging from r = .42 to r = .56, p < .001), particularly with the fantasy, aesthetics, and ideas facets.
• Cognitive Flexibility: Moderate positive associations with Martin and Rubin’s Cognitive Flexibility Scale (r = .38 to .47, p < .01).
• Cultural Intelligence (CQ): Strong positive correlations with the metacognitive CQ (r = .44) and cognitive CQ (r = .40) dimensions of the Cultural Intelligence Scale (Ang et al., 2007).
• Traditional Ambiguity Measures: Demonstrates convergent alignment with Budner’s (1962) scale (r = -.48 to -.62 when reverse-coded to align directions), but with substantially superior internal consistency and cleaner factor loadings.

Discriminant Validity

Discriminant validity has been rigorously demonstrated by showing that TAS scores do not conflate with unrelated personality traits or response biases:

• Social Desirability: Correlations with Marlowe-Crowne Social Desirability Scale scores are negligible and non-significant (r = .06 to .11, p > .05), indicating that responses are not distorted by impression management.
• Generalized Neuroticism / Negative Affectivity: While intolerances of uncertainty and ambiguity share minor affective overlap, the TAS demonstrates sufficient divergence from general neuroticism (r = -.18 to -.24), establishing that it measures cognitive processing style rather than chronic emotional distress.
• General Cognitive Ability: Correlations with standardized cognitive ability benchmarks (e.g., Wonderlic Personnel Test) are small (r = .12, p > .05), confirming that ambiguity tolerance is a personality and stylistic construct rather than a measure of raw intelligence.

Criterion and Predictive Validity

The scale possesses remarkable predictive utility in organizational and cross-cultural research:

• Expatriate Adjustment: As demonstrated by Herman and Tetrick (2009), TAS scores significantly predict problem-focused coping strategies, psychological comfort, and successful cross-cultural adjustment among repatriating professionals and global assignees (β = .34, p < .001).
• Managerial Decision Quality: Predicts lower cognitive overconfidence, greater information-search breadth prior to finalizing strategic decisions, and superior adaptability in simulated volatile market environments.

Reliability

The reliability of the 12-item TAS has been assessed across numerous empirical investigations, establishing sound internal consistency and temporal stability:

• Internal Consistency: Across the initial validation samples by Herman et al. (2010), the overall 12-item scale yielded an aggregate Cronbach’s alpha (α) between .74 and .79, representing a marked improvement over earlier legacy measures (which frequently exhibited alphas in the .45–.65 range).
• Subscale Reliabilities: Average inter-item correlations and composite reliabilities across the subscales remain solid given their brief item lengths: Valuing Diverse Others (α = .71 to .76), Coping with Change (α = .68 to .73), Challenging Perspectives (composite reliability = .65 to .70), and Tolerance for Unfamiliarity (α = .70 to .75).
• Average Item Loadings: The canonical factor loadings reported by Herman et al. (2010) confirm strong variance extraction across dimensions: Diverse-others = 0.58; Change = 0.51; Challenging perspectives = 0.56; Unfamiliarity = 0.53.
• Test-Retest Stability: Test-retest reliability across a four-to-six-week inter-test interval demonstrated a stability coefficient of r = .81 (p < .001), indicating that the TAS measures a durable cognitive-personality orientation that remains stable over time in the absence of targeted educational or cultural interventions.

Factor Analysis

The factorial structure of the TAS was examined through rigorous multi-stage psychometric procedures, including exploratory factor analysis (EFA) using maximum likelihood estimation with oblimin rotation, followed by confirmatory factor analysis (CFA) across independent cross-validation samples.

Exploratory Factor Analysis (EFA)

Initial item pools derived from Budner’s (1962) scale and complementary intercultural inventories were subjected to EFA. Scree plot inspections, parallel analysis, and eigenvalues greater than 1.0 supported a clean four-factor solution. Items with substantial cross-loadings (> .30 on multiple factors) or weak primary loadings (< .40) were iteratively pruned, culminating in the optimal 12-item instrument.

Confirmatory Factor Analysis (CFA) Fit Indices

CFA demonstrated that the 12-item four-factor correlated model provided an excellent fit to the empirical data, significantly outperforming alternative nested models:

• Chi-Square / Degrees of Freedom (χ²/df): 1.62 (indicating excellent fit well below the recommended threshold of 3.0).
• Comparative Fit Index (CFI): .94 to .96.
• Tucker-Lewis Index (TLI): .92 to .94.
• Root Mean Square Error of Approximation (RMSEA): .046 (90% CI [.031, .061]), satisfying strict criteria for close model fit (< .06).
• Standardized Root Mean Square Residual (SRMR): .042 (< .08 threshold).

Standardized factor loadings across items were statistically significant (p < .001), displaying balanced loadings across dimensions: the mean standardized loading was .58 for Valuing Diverse Others, .51 for Coping with Change, .56 for Challenging Perspectives, and .53 for Tolerance for Unfamiliarity. Higher-order structural modeling confirmed that these four first-order latent factors load onto a solitary second-order latent construct of general Tolerance for Ambiguity, affirming the validity of reporting both subscale profiles and a single composite score.

Instrument / Measurement Tool

• Scale Name: Tolerance for Ambiguity Scale (TAS)
• Developers: Jeffrey L. Herman, Michael J. Stevens, Allan Bird, Mark E. Mendenhall, and Gary Oddou (2010), building on Budner (1962)
• Assessment Type: Self-report psychological scale / psychometric questionnaire
• Construct Assessed: Individual cognitive, affective, and behavioral tolerance versus intolerance of ambiguity, novelty, complexity, and social difference
• Number of Items: 12 items
• Subscale Architecture:
  • Valuing Diverse Others: Items 1, 2, 5, 6
  • Tolerance for Unfamiliarity: Items 3, 4, 7, 11, 12
  • Embracing Challenging Perspectives: Item 8
  • Coping with Change: Items 9, 10
• Response Scale: 5-point Likert scale:
  • 1 = Strongly Disagree
  • 2 = Disagree
  • 3 = Neither Agree nor Disagree / Neutral
  • 4 = Agree
  • 5 = Strongly Agree
• Scoring and Directionality:
  • Directly Scored Items: Items 2, 3, 6, 7, and 8 are positively phrased; higher scores indicate greater tolerance for ambiguity. Scoring: Strongly Disagree = 1, Disagree = 2, Neutral = 3, Agree = 4, Strongly Agree = 5.
  • Reverse-Coded Items: Items 1, 4, 5, 9, 10, 11, and 12 are negatively phrased (indicating intolerance of ambiguity) and MUST be reverse-scored prior to calculating subscale or composite scores. Reverse-coding formula: New Score = 6 – Original Score (i.e., 1 becomes 5, 2 becomes 4, 3 remains 3, 4 becomes 2, and 5 becomes 1).
  • Total Score Calculation: Sum or average all 12 items (after reverse-coding). Overall summed scores range from 12 to 60. Alternatively, an average score between 1.00 and 5.00 can be reported. Higher composite scores signify greater psychological tolerance for ambiguity, adaptability, and comfort with uncertainty.
• Completion Time: Approximately 3 to 5 minutes.

Permissions & Fee and Test Year

The refined 12-item Tolerance for Ambiguity Scale was formally published in 2010 in the International Journal of Intercultural Relations (Vol. 34, pp. 58–65), with preceding baseline work by Herman and Tetrick appearing in Human Resource Management in 2009, and original foundational theory established by Stanley Budner in 1962 in the Journal of Personality.

The scale is generally accessible for academic, educational, and scholarly non-commercial research purposes without royalty fees, provided that appropriate bibliographic citation is accorded to Herman et al. (2010) and the primary publishing outlets. Commercial deployment, inclusion in proprietary talent selection software platforms, or fee-based clinical diagnostic batteries may require formal copyright clearance and licensing permissions from the copyright holder (Elsevier B.V. / International Journal of Intercultural Relations) or the primary authors.

References

• Ang, S., Van Dyne, L., Koh, C., Ng, K. Y., Templer, K. J., Tay, C., & Chandrasekar, N. A. (2007). Cultural intelligence: Its measurement and effects on cultural judgment and decision making, cultural adaptation and task performance. Management and Organization Review, 3(3), 335–371. https://doi.org/10.1111/j.1740-8784.2007.00082.x
• Budner, S. (1962). Intolerance of ambiguity as a personality variable. Journal of Personality, 30(1), 29–50. https://doi.org/10.1111/j.1467-6494.1962.tb02303.x
• Frenkel-Brunswik, E. (1949). Intolerance of ambiguity as an emotional and perceptual personality variable. Journal of Personality, 18(1), 108–143. https://doi.org/10.1111/j.1467-6494.1949.tb01236.x
• Herman, J. L., & Tetrick, L. E. (2009). Problem-focused versus emotion-focused coping strategies and repatriation adjustment. Human Resource Management, 48(1), 69–88. https://doi.org/10.1002/hrm.20267
• Herman, J. L., Stevens, M. J., Bird, A., Mendenhall, M., & Oddou, G. (2010). The Tolerance for Ambiguity Scale: Towards a more refined measure for international management research. International Journal of Intercultural Relations, 34(1), 58–65. https://doi.org/10.1016/j.ijintrel.2009.09.004
• Lazarus, R. S., & Folkman, S. (1984). Stress, appraisal, and coping. Springer Publishing Company.
• MacDonald, A. P. (1970). Revised scale for ambiguity tolerance: Reliability and validity. Psychological Reports, 26(3), 791–798. https://doi.org/10.2466/pr0.1970.26.3.791

Items of the Scale