Intolerance of Uncertainty Scale (IAS) Test

People who feel uneasy when answers are incomplete, plans change, or situations resist clear interpretation may use the Intolerance of Uncertainty Scale (IAS) Test to examine those reactions. The questionnaire focuses on everyday judgments rather than a single event or symptom. This intolerance of uncertainty assessment offers a structured profile of where ambiguity may feel manageable and where it may create pressure for certainty.

What This Assessment Explores

Patterns include incomplete information, conflicting answers, complexity, unfamiliarity, and anticipated uncertainty. The intolerance of uncertainty scale profiles tendencies, not a fixed personality label.

The dimensions are:

• Unresolvability (3-21) measures discomfort with unresolved or contradictory situations; higher scores may indicate avoiding situations lacking a clear, unambiguous solution: Low 3-8; Moderate 9-14; High 15-21.
• Complexity (9-63) measures attitudes toward complex, ambiguous situations; higher scores may indicate difficulty tolerating ambiguity and making complex decisions: Low difficulty 9-26; Moderate difficulty 27-44; High difficulty 45-63.
• Novelty (4-28) measures responses to unfamiliar situations; higher scores may indicate discomfort in unfamiliar situations: Comfort with novelty 4-12; Mixed response 13-20; Discomfort with novelty 21-28.
• Intolerance of Uncertainty (16-112) measures anxiety in present or anticipated uncertainty; higher levels may indicate preference for strict structure and avoidance of ambiguity: Low 16-39; Moderate 40-50; High 51-112.

Methodology and Evidence Base

Statements cover judgments about clear answers, schedules, unfamiliar people or places, incomplete information, originality, and whether complexity feels stimulating or burdensome. They use a seven-point agreement format from Strongly disagree to Strongly agree, including Not sure or Do not know. This lets respondents show direction and strength without a forced yes-or-no answer.

The online self-report questionnaire reports four scale scores within displayed interpretive ranges but has no population standardization or norms. This online adaptation uses items from Budner’s published Intolerance of Ambiguity Scale (1962), distinct from that instrument; Carleton’s 2012 work offers a later framework linking intolerance of uncertainty with anxiety-related processes. Furnham and Ribchester’s review situates tolerance of ambiguity within a broader measurement tradition, while Bors, Gruman, and Shukla examine how item polarity and dimensionality affect interpretation. This uncertainty tolerance questionnaire is an online self-report profile, not a diagnostic instrument.

Interpret results as indications of situations that may feel more or less manageable, considering current stress, context, and self-report bias. Comparing results across circumstances may help distinguish a stable tendency from a situational response.