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Intolerance of Uncertainty Scale (IAS)

Intolerance of Uncertainty Scale (IAS) Test

Understand how you handle uncertainty and where anxiety spikes in just 3 minutes. Get fast, actionable insight to guide coping strategies, counseling goals, or fit for high-ambiguity roles.

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Questions: 133 minutes

Hi! My name is Freudly, i am an AI therapist, I will give you an interpretation of the test after you complete it.

08:30

October 2, 2025

October 2, 2025
Material has been updated

October 2, 2025
Material has been published

23,390 views

2,483 completions

2,045 likes

Verified by Daniel Hall

Psychologist with 25 years of experience

Scale Explorer

How the Scales are Structured

example score

7/9

Tolerance of Uncertainty (ToU)

Measures how comfortably a person can function and stay productive in ambiguous or unpredictable situations.

Low

Moderate

High

0 – 4: Low | 5 – 7: Moderate | 8 – 9: High

A score of 7 indicates a moderate tolerance for uncertainty, meaning unclear situations are generally manageable and can be approached constructively, though they may still feel somewhat challenging at times.

example score

6/9

Intolerance of Uncertainty (IoU)

Measures how strongly a person tends to feel anxious and seek control when facing ambiguous or unpredictable situations.

Low

Moderate

High

0 – 3: Low | 4 – 6: Moderate | 7 – 9: High

A score of 6 indicates a moderate level of intolerance of uncertainty, suggesting noticeable discomfort with ambiguity and a tendency to prefer clear rules and predictability, especially under stress.

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DATA-BASED USER COHORTS

Who Usually Takes This Test?

Anxious in unclear situations

41%OF USERS

People who feel stressed when plans change or answers aren’t immediate take it to understand their uncertainty triggers and coping style.

Therapy and self-growth seekers

34%OF USERS

People working on anxiety, perfectionism, or control issues use it to spot patterns and track progress in handling the unknown.

Decision-heavy professionals

25%OF USERS

Managers, entrepreneurs, and specialists facing risk and ambiguity take it to see whether uncertainty pushes them to avoid or engage.

BASED ON AGGREGATED, ANONYMIZED DATA FROM TENS OF THOUSANDS OF FREUDLY USERS.

RESULTS YOU CAN ACTUALLY USE

Scale Results
— Explained Clearly

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Interpretation

You’ll receive a structured, clinically-grounded explanation. Our AI analyzes patterns and relationships between scales to provide a coherent interpretation, without exaggerated language.

Statistical
Comparison

See how your results compare to others. Anonymized platform data is used to create a percentile scale, which identifies whether your results are typical.

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Recommendations

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Insights

Get insights on behavioral and thought patterns you might not notice on your own. By uncovering subtle connections between your responses, you’ll better understand what may be driving your current results.

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Clarify, reflect, and explore your results right away. Talk through your experience, ask questions, and explore meanings in a calm, non-diagnostic dialogue.

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Used in 52+ countries

Benchmarking

See How You Compare

Once you complete the test, your results are compared with real-world data from people in your country.
Below is a preview of how scores are typically distributed across each scale.

Tolerance for Uncertainty (TfU)

Average

5.3

Normal range

4 — 6.7

min.

max.

Majority

This curve shows how scores are typically distributed.
Once you complete the test, your result will appear on the scale so you can see how you compare.

Intolerance of Uncertainty (IoU)

Average

5.1

Normal range

3.7 — 6.5

min.

max.

Majority

This curve shows how scores are typically distributed.
Once you complete the test, your result will appear on the scale so you can see how you compare.

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CLEAR ANSWERS TO COMMON QUESTIONS

Frequently Asked Questions

What does this questionnaire measure?

It measures reactions to unclear or unpredictable situations. It provides separate scores for difficulty tolerating uncertainty and comfort with uncertainty.

How long does it take and how many items are included?

It takes about 3 minutes to complete. It contains 13 statements.

How should responses be selected?

Select the option that best matches typical feelings and behavior in uncertain situations. Answer all items based on general patterns rather than a single event.

How are results interpreted?

Higher intolerance scores indicate greater distress and avoidance when outcomes are unclear. Higher tolerance scores indicate greater comfort and flexibility under uncertainty.

Can results be used as a diagnosis?

No, the results are not diagnostic. They are used to describe a trait that may inform counseling, research, or decision-making when uncertainty-related stress is relevant.

WHAT THE TEST MEASURES

About This Assessment

Intolerance of Uncertainty Scale (IAS) Test - Symptoms and Signs

uncertainty tolerance

This self-report measure assesses individual differences in responses to ambiguous or unpredictable situations. The Intolerance of Uncertainty Scale (IAS) is commonly used to support clinical case formulation and research on worry and anxiety-related processes.

The instrument includes 13 items and typically requires about 3 minutes to complete. Respondents rate statements describing reactions to uncertainty; scores are interpreted as reflecting the degree of difficulty tolerating uncertain outcomes rather than providing a standalone diagnosis.

When clinically indicated, the Intolerance of Uncertainty Scale (IAS) can be used alongside other symptom and functional measures to inform treatment planning and to monitor change over time. The scale is attributed to M. J. Dugas and R. N. Carleton.

Author: M. J. Dugas, R. N. Carleton

Literature: Carleton, R. N. The intolerance of uncertainty construct in the context of anxiety disorders: Theoretical and practical perspectives. Expert Review of Neurotherapeutics. 2012.; Dugas, M. J., & Robichaud, M. Cognitive-behavioral treatment for generalized anxiety disorder: From science to practice. Routledge. 2007.; Budner, S. Intolerance of ambiguity as a personality variable. Journal of Personality. 1962.

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