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Intolerance of Uncertainty Scale Test

Understand how you handle uncertainty and related worry in about 5 minutes. Useful for therapy progress tracking and support for anxiety, panic, stress, and change at work.
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Questions: 275 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
24054 views
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How the Scales are Structured
example score
129/135
Intolerance of Uncertainty Scale (IoUS)
Measures how difficult it is for a person to tolerate uncertainty and cope with situations where outcomes are unknown.
More tolerant
Elevated difficulty
Very high difficulty
27 – 40: More tolerant | 41 – 70: Elevated difficulty | 71 – 135: Very high difficulty
A score of 129 falls in the Very high difficulty range, suggesting uncertainty is likely experienced as highly distressing and may strongly amplify worry in ambiguous situations.
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DATA-BASED USER COHORTS
Who Usually Takes This Test?
Worriers and overthinkers
41%OF USERS
People who feel anxious when plans are unclear and find themselves repeatedly checking, researching, or seeking reassurance before making decisions.
Clients in therapy
34%OF USERS
People working with a therapist for anxiety, panic, or stress who want a quick way to measure how uncertainty affects them and track change over time.
Teams facing change
25%OF USERS
Employees and managers in fast-changing environments who want to understand who struggles without clear instructions and who may need extra support during transitions.
BASED ON AGGREGATED, ANONYMIZED DATA FROM TENS OF THOUSANDS OF FREUDLY USERS.
RESULTS YOU CAN ACTUALLY USE
What You’ll See After You Finish the Test
Scale Results
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Interpretation
A structured, clinically grounded explanation. Our AI analyzes patterns and relationships between scales to provide a coherent interpretation — without alarmist language.
Statistical
Comparison
See how you compare to others. Your scores are placed in a statistical context, showing percentiles and trends based on anonymized platform data to help you understand what`s typical.
Practical
Recommendations
Actionable guidance tailored to your profile. Receive clear, realistic suggestions you can apply immediately — focused on coping, self-regulation, and realistic next steps.
AI-Detected
Insights
Key patterns you might not notice on your own. Surfacing subtle connections in your responses that help you better understand what may be driving your current results.
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an AI Psychologist
Clarify, reflect, and explore right away. Talk through your outcomes, ask questions, and explore meanings in a calm, non-diagnostic dialogue environment.
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Used in 52+ countries
Benchmarking
See How You Compare
Once you finish the test, your results will be compared with real-world data from people in your country.
Below is a preview of the benchmarks we use to place your score in context.
Intolerance of Uncertainty Scale (IoUS)
Average
61.6
Normal range
45.5 — 77.7
min.
27
max.
135
majority
This curve shows how scores are typically distributed.
Once you complete the test, your result will appear here so you can see where you land.
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Trusted by 22k+ Users Worldwide
CLEAR ANSWERS TO COMMON QUESTIONS
Frequently Asked Questions

Any questions left?

What does this questionnaire measure?
It measures how strongly a person reacts to uncertain or ambiguous situations. Higher scores indicate greater difficulty tolerating uncertainty and a greater tendency toward worry.
How long does it take, and how many items are included?
Completion typically takes about 5 minutes. It contains 27 items.
How should items be answered?
Select the response that best reflects typical thoughts and reactions, not a single unusual event. Answer all items and avoid spending too much time on any one item.
How are results used in clinical or counseling settings?
Results can support case formulation and treatment planning for anxiety, stress, and panic-related concerns. They can also help identify areas to target when working on responses to uncertainty.
Can it be repeated to track change over time?
Yes, it may be re-administered to monitor change during treatment or skills training. Score shifts can help evaluate whether tolerance of uncertainty is improving.
WHAT THE TEST MEASURES
About This Assessment
Intolerance of Uncertainty Scale Test

Intolerance of Uncertainty Scale Test

uncertaintytolerance

This self-report measure assesses an individual’s tendency to respond negatively to uncertain situations. The Intolerance of Uncertainty Scale is commonly used to characterize a cognitive-affective style associated with worry and anxiety.

It consists of 27 items and typically takes about 5 minutes to complete. Items evaluate beliefs and reactions related to ambiguity, unpredictability, and perceived threat in uncertain contexts.

In clinical and applied settings, the Intolerance of Uncertainty Scale may support case formulation, treatment planning, and monitoring of change over time, particularly when uncertainty-related worry is a relevant presenting concern.

Author: michel-dugas, robert-ladouceur
Literature: Dugas, M. J., & Robichaud, M. Cognitive-behavioral treatment for generalized anxiety disorder: From science to practice. Routledge. 2007.
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