Scale of Tolerance-Intolerance of Ambiguity

Abstract

The Scale of Tolerance-Intolerance of Ambiguity, developed by Stanley Budner in 1962, is an enduring psychometric instrument designed to quantify an individual’s cognitive and affective orientation toward ambiguous scenarios. Budner conceptualized intolerance of ambiguity as the dispositional tendency to interpret ambiguous situations—marked by novelty, complexity, or insolubility—as sources of psychological threat, whereas tolerance of ambiguity reflects the tendency to interpret such conditions as desirable, stimulating, or benign challenges. The scale comprises 16 self-report items balanced across positively and negatively worded statements to control for acquiescence response bias. Responses are gathered using a 6-point Likert scale ranging from Strongly disagree to Strongly agree, frequently adapted in psychometric research to a 7-point continuum incorporating a neutral midpoint. Psychometric evaluations across Budner’s original 17 normative samples (encompassing undergraduate, graduate, medical, and adult education cohorts) yielded an average Cronbach’s alpha coefficient of approximately .49 to .62, reflecting the broad heterogeneity of the underlying theoretical construct. Validity evaluations have demonstrated consistent correlations between the scale and constructs such as authoritarianism, dogmatism, cognitive rigidity, career selection in medical contexts, resistance to organizational change, and conventionality. Despite historical debates concerning its internal consistency and multidimensional factor structure, Budner’s scale remains a foundational benchmark in personality psychology, behavioral economics, and organizational behavior.

Keywords

Tolerance of Ambiguity, Intolerance of Ambiguity, Stanley Budner, Cognitive Style, Personality Assessment, Psychometrics, Ambiguity Threat, Novelty, Complexity, Insolubility, Authoritarian Personality, Construct Validity

Authors

The scale was developed by Stanley Budner, Ph.D., during his tenure in the Department of Psychology and the Bureau of Applied Social Research at Columbia University. Budner published the definitive formulation and validation of the instrument in his seminal 1962 monograph entitled “Intolerance of Ambiguity as a Personality Variable” in the Journal of Personality. Budner’s scholarly endeavors focused on social psychology, medical education socialization, psychological measurement, and the intersection of cognitive personality styles with social attitudes and professional decision-making.

Purpose

The Scale of Tolerance-Intolerance of Ambiguity was engineered to operationalize and measure a generalized personality trait governing how individuals perceive, interpret, and adapt to situations characterized by insufficient, conflicting, or overly intricate information. Prior to Budner’s formulation, clinical and social researchers lacked an objective, standardized, content-valid instrument that assessed ambiguity tolerance independently of specific ideological or sociopolitical contents, such as ethnic prejudice or rigid ethnocentrism.

The primary clinical, educational, and organizational purposes of the instrument include:

• Evaluating Cognitive Style and Threat Reactivity: The scale distinguishes between individuals who experience cognitive disequilibrium as an aversive, threatening state requiring rapid closure versus those who embrace open-endedness, theoretical flexibility, and exploratory behavior.
• Predicting Occupational and Specialization Preferences: In vocational and professional settings—most notably medical education—the scale assesses how intolerance of ambiguity predicts choices between highly structured specialties (such as surgery or pathology) versus less structured, uncertainty-laden disciplines (such as psychiatry or general practice).
• Organizational Decision-Making and Leadership Research: The instrument assesses executive capacity to manage strategic volatility, navigate ambiguous market indicators, and adapt to rapid organizational transitions without resorting to defensive psychological mechanisms or premature decision closure.
• Cross-Disciplinary Academic Research: The scale facilitates empirical exploration into the relationships connecting personality dimensions with cognitive dissonance, dogmatic belief systems, ideological rigidity, creative problem-solving capabilities, and educational methodologies.

Psychological Construct

Budner formally defined intolerance of ambiguity as “the tendency to perceive (i.e., interpret) ambiguous situations as sources of threat” and tolerance of ambiguity as “the tendency to perceive ambiguous situations as desirable.” In Budner’s psychometric formulation, an ambiguous situation is defined as one in which an individual cannot adequately structure or categorize relevant environmental cues due to a deficit in familiar informational patterns.

Budner identified three foundational empirical conditions that engender ambiguity:

• Novelty: Situations presenting completely unfamiliar cues, environments, or tasks where prior experience offers no direct cognitive precedent or behavioral script (e.g., encountering unfamiliar cultural environments or unprecedented conceptual paradigms).
• Complexity: Situations characterized by an overwhelming density or multiplicity of cues, requiring the individual to process multifaceted and potentially competing data streams simultaneously (e.g., intricate multi-variable problems or multifaceted social interactions).
• Insolubility: Situations marked by contradictory, contradictory-appearing, or fundamentally unresolvable information where conventional deductive pathways fail to yield definitive solutions (e.g., paradoxical assignments, vague supervisory directives, or existential dilemmas).

The construct further delineates four distinct manifestations of threat perception triggered by ambiguous conditions:

1. Phenomenological Repression / Denial: Conscious or subconscious refusal to acknowledge the presence of ambiguity, characterized by rigid oversimplification and premature cognitive closure.
2. Phenomenological Submission: Conscious perception of ambiguity accompanied by intense subjective discomfort, anxiety, helplessness, or feelings of personal inadequacy.
3. Operative Repression / Denial: Behavioral patterns designed to artificially impose order, eliminate variance, or escape the ambiguous situation through conventional, repetitive, or ritualized actions.
4. Operative Submission: Direct behavioral surrender, paralysis, or destructive avoidance when structured parameters are absent.

Consequently, high scorers on the scale exhibit a pervasive dispositional pattern: they gravitate toward clear rules, predictable social configurations, dichotomous moral frameworks, and dogmatic truths, while experiencing pronounced discomfort when confronted with complex, nuanced, or open-ended realities.

Theoretical Framework

The conceptual foundation of Budner’s scale originated in the mid-20th-century personality research spearheaded by Else Frenkel-Brunswik. In her foundational 1949 work, Frenkel-Brunswik introduced “intolerance of ambiguity” as an overarching emotional and cognitive personality variable rooted in psychodynamic development and tied directly to the etiology of The Authoritarian Personality (Adorno et al., 1950).

Frenkel-Brunswik posited that early socialization characterized by punitive parental discipline and rigid behavioral expectations forces children to repress ambivalence toward authority. This dynamic engenders a generalized cognitive rigidity wherein the individual cannot tolerate mixed affective states, leading to an intolerance of cognitive ambiguity across perceptual, social, and ideological domains. Such individuals exhibit an oversimplified perceptual style, relying heavily on binary categories (e.g., good versus bad, familiar versus alien).

Budner sought to extract the construct of ambiguity intolerance from pure psychoanalytic conjecture and ideological confounders. He reformulated ambiguity tolerance within an information-processing and cognitive personality framework. Rather than viewing intolerance purely as a clinical pathology or an outgrowth of latent authoritarian aggression, Budner operationalized it as a pervasive cognitive-evaluative filter. Drawing upon Gestalt psychology principles—specifically the law of Prägnanz and the human need for closure—Budner conceptualized ambiguity tolerance as an individual-difference variable governing cognitive homeostasis.

According to Budner’s framework, when an individual encounters sensory, social, or intellectual inputs that cannot be readily assimilated into preexisting cognitive schemata, cognitive tension inevitably arises. An ambiguity-tolerant individual views this discrepancy as an intellectually stimulating challenge, expanding their cognitive schema to accommodate the new data. Conversely, an ambiguity-intolerant individual perceives this mismatch as an ontological threat to their cognitive integrity, triggering defensive mechanisms designed to restore certainty through dogmatic assimilation, cognitive distortion, or outright rejection of the stimuli.

Validity

Budner conducted extensive validation analyses across 17 independent samples totaling over 700 respondents, demonstrating multi-faceted construct, convergent, and criterion-related validity.

Convergent and Concurrent Validity

To establish convergent validity, Budner correlated the Scale of Tolerance-Intolerance of Ambiguity with previously established instruments and external behavioral indices:

• Correlations with Existing Ambiguity Measures: Budner observed significant positive correlations with Walk’s (1950) Scale of Ambiguity Intolerance (correlations ranging from .37 to .60 across different samples), demonstrating that the scale effectively captured the target construct.
• Correlations with Authoritarianism and Dogmatism: Consistent with theoretical postulations, Budner reported robust positive correlations with the California F-Scale (measuring authoritarian tendencies; r = .38 to .58) and Milton Rokeach’s Dogmatism Scale (r = .44).
• Peer and Clinical Evaluations: Validation against external observational data yielded significant correlations. In sociometric evaluations, peer ratings of ambiguity tolerance significantly tracked scale scores (r = .34 to .48). Furthermore, qualitative content analysis of autobiographical narratives produced independent ratings of ambiguity intolerance that correlated significantly with scale results (r = .32).

Criterion and Predictive Validity

The scale has consistently demonstrated predictive utility across diverse naturalistic environments:

• Medical Specialty Selection: Budner demonstrated that medical students scoring high in intolerance of ambiguity exhibited marked preferences for highly structured specialties such as surgery, anesthesiology, and pathology, whereas low-scoring (tolerant) students systematically preferred specialties characterized by diagnostic uncertainty, complex etiology, and longitudinal psychosocial interactions, such as psychiatry and internal medicine.
• Belief Systems and Social Attitudes: High ambiguity intolerance significantly correlated with conventionality, strict adherence to established religious doctrine, belief in an interventionist divine power, and support for institutional censorship of unorthodox literature and art.
• Resistance to Institutional Change: Subsequent organizational research has validated the scale as an effective predictor of employee stress, resistance to restructuring, and turnover intentions during corporate mergers and organizational transitions.

Reliability

The reliability of the Scale of Tolerance-Intolerance of Ambiguity has been thoroughly documented across decades of empirical application, revealing unique psychometric characteristics attributable to the construct’s breadth.

Internal Consistency

In Budner’s initial 1962 validation studies encompassing 17 diverse samples, the average internal consistency reliability measured via Cronbach’s alpha was .49, with sample-specific coefficients ranging between .39 and .62. Although these alpha coefficients fall below contemporary psychometric thresholds for clinical diagnostics (typically ≥ .70), Budner and later psychometricians (e.g., Furnham, 1994) argued that this modest internal consistency is a structural consequence of measuring a broad, multidimensional construct across disparate situational manifestations (Novelty, Complexity, Insolubility) using an ultra-brief 16-item inventory. Subsequent replications across corporate and academic settings have reported internal consistency coefficients hovering between .55 and .68.

Test-Retest Stability

Budner assessed temporal stability across multiple time intervals, observing test-retest reliability coefficients ranging from .63 to .85 across periods extending from two to fifteen weeks. These values confirm that despite internal item heterogeneity, the overall scale captures a relatively stable, enduring personality trait rather than transient mood fluctuations or situational states.

Factor Analysis

Although Budner did not employ exploratory factor analysis (EFA) during the initial 1962 instrument construction—relying instead on a deductively derived, rational-theoretical matrix—subsequent psychometric investigations have rigorously scrutinized the scale’s latent structure.

The Theoretical Tripartite Matrix

Budner formulated the 16 items using a theoretical 3 × 4 matrix crossing three situational contexts with four psychological response modes:

• Novelty: Items 2, 9, 11, and 12.
• Complexity: Items 4, 5, 6, and 7.
• Insolubility: Items 1, 3, 8, 10, 13, 14, 15, and 16.

Empirical Factor Structures in Subsequent Research

Subsequent psychometric evaluations utilizing Exploratory Factor Analysis (EFA) with orthogonal and oblique rotations (e.g., Kirton, 1981; Furnham, 1994; Benjamin et al.) have yielded mixed findings regarding whether the scale represents a single general factor or a multi-dimensional construct:

• Method Artifact / Polarity Factors: Numerous factor-analytic studies have identified a prominent two-factor solution driven primarily by item valence—separating the 8 positively keyed items (intolerance) from the 8 reverse-keyed items (tolerance). This pattern reflects common method variance and acquiescence response tendencies often observed in balanced personality inventories.
• Three-Factor Situational Solutions: When method artifacts are statistically controlled, factor analyses frequently extract three substantive factors that align moderately with Budner’s conceptualized domains: (1) Dislike of Ambiguous Problem Situations (Insolubility), (2) Preference for the Familiar and Structured (Complexity/Order), and (3) Acceptance of Unconventional People and Ambiguous Tasks (Novelty). Factor loadings for primary items across these dimensions generally range between .35 and .68.
• Confirmatory Factor Analysis (CFA) Fit: Contemporary CFA evaluations generally reveal that while a strict unifactorial model exhibits marginal model fit (e.g., RMSEA > .08, CFI < .85), bifactor models incorporating a general Tolerance of Ambiguity factor alongside specific method/subscale factors achieve acceptable fit indices (RMSEA ≈ .05, CFI ≈ .91), supporting the aggregation of items into a composite global score.

Instrument / Measurement Tool

• Instrument Name: Scale of Tolerance-Intolerance of Ambiguity (also known in the literature as Budner’s Ambiguity Scale).
• Author: Stanley Budner, Ph.D.
• Year of Publication: 1962.
• Assessment Type: Self-report psychological rating scale.
• Construct Assessed: Personality disposition toward ambiguity (Tolerance vs. Intolerance of Ambiguity).
• Number of Items: 16 items.
• Target Population: Adults (18 years and older; undergraduate, graduate, and professional populations).
• Administration Time: Approximately 5 to 10 minutes.
• Response Format: 6-point Likert scale (originally published with six alternatives: 1 = Strongly disagree, 2 = Moderately disagree, 3 = Slightly disagree, 4 = Slightly agree, 5 = Moderately agree, 6 = Strongly agree).
• Direction of Scoring: Higher total scores reflect greater intolerance of ambiguity (greater perception of threat). Lower total scores indicate greater tolerance of ambiguity.
• Keying & Reverse-Scored Items:
  • Positively Scored Items (Directly keyed to Intolerance): Items reflecting threat or discomfort with ambiguity (Items 1, 3, 4, 7, 8, 10, 13, and 16). (Note: Scoring protocols in the literature score direct items 1 to 6 or 1 to 7 depending on whether a neutral midpoint is included; in the standard 6-point scheme, Strongly Agree = 6, Strongly Disagree = 1).
  • Reverse-Scored Items (Keyed to Tolerance): Items where agreement indicates comfort with ambiguity (Items 2, 5, 6, 9, 11, 12, 14, and 15). These items are inverted prior to summation: 1 becomes 6, 2 becomes 5, 3 becomes 4, 4 becomes 3, 5 becomes 2, and 6 becomes 1.
• Theoretical Subscale Assignments:
  • Novelty: Items 2, 9, 11, 12.
  • Complexity: Items 4, 5, 6, 7.
  • Insolubility: Items 1, 3, 8, 10, 13, 14, 15, 16.
• Handling of Omissions: In Budner’s original protocol, missing or omitted items were assigned a median score of 4 (on a 7-point conversion scale) or proportionally imputed based on completed items.

Permissions & Fee and Test Year

The Scale of Tolerance-Intolerance of Ambiguity was published in 1962 by Stanley Budner in the peer-reviewed academic literature (Journal of Personality, Volume 30, Issue 1). As a historic psychometric instrument published in an academic journal prior to modern commercial proprietary licensing restrictions, the 16-item instrument resides in the academic public domain for non-commercial educational, scientific, and psychological research purposes. No licensing fees or formal commercial permissions are required for academic research administration, provided appropriate scholarly attribution and reference to Budner’s original 1962 publication are maintained.

References

• Adorno, T. W., Frenkel-Brunswik, E., Levinson, D. J., & Sanford, R. N. (1950). The Authoritarian Personality. Harper & Brothers.
• Benjamin, L., Vance, C. A., & Sanchez, J. (1988). A critical psychometric evaluation of Budner’s Scale of Tolerance-Intolerance of Ambiguity. Journal of Social Behavior and Personality, 3(4), 421–434.
• 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
• Furnham, A. (1994). A content, correlational, and factor analytic study of four tolerance of ambiguity questionnaires. Personality and Individual Differences, 16(3), 403–410. https://doi.org/10.1016/0191-8869(94)90066-3
• Kirton, M. J. (1981). A reanalysis of two scales of tolerance of ambiguity. Journal of Personality Assessment, 45(4), 407–414. https://doi.org/10.1207/s15327752jpa4504_11
• 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
• McLain, D. L. (1993). The MSTAT-I: A new measure of an individual’s tolerance for ambiguity. Educational and Psychological Measurement, 53(1), 183–189. https://doi.org/10.1177/0013164493053001020
• Rokeach, M. (1960). The Open and Closed Mind: Investigations into the Nature of Belief Systems and Personality Systems. Basic Books.
• Walk, R. D. (1950). A concept formation approach to attitude measurement (Unpublished doctoral dissertation). Harvard University.

Items of the Scale