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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How the Scales are Structured
DATA-BASED USER COHORTS
Who Usually Takes This Test?
BASED ON AGGREGATED, ANONYMIZED DATA FROM TENS OF THOUSANDS OF FREUDLY USERS.
RESULTS YOU CAN ACTUALLY USE
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.
Below is a preview of how scores are typically distributed across each scale.
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 on the scale so you can see how you compare.
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 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
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Intolerance of Uncertainty Scale Test - Symptoms and Signs
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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