IUS
Intolerance of Uncertainty Scale (IUS)
The Intolerance of Uncertainty Scale (IUS) is a psychometric tool used to measure a person's difficulty tolerating uncertainty, that is, their inability to accept the idea that future events may be unpredictable or ambiguous.
- Number of questions
- 27 questions
- Estimated duration
- 6 minutes
- Language
- English
- Original name
- Intolerance of Uncertainty Scale
- Target audience
- Adults
- Authors
- Dugas MJ, Ladouceur R. (2002)
- Category
- Anxiety
Preview of the 27 questions
Scoring & interpretation
The scale uses a Likert format in which participants answer each item on a scale from 1 (Not at all characteristic of me) to 5 (Entirely characteristic of me). High total scores indicate greater intolerance of uncertainty.
The IUS can be scored according to 2 models:
One-factor model: Add up the scores of all items to obtain an overall total score of intolerance of uncertainty.
Two-factor model: This model distinguishes two dimensions: Factor 1: Uncertainty perceived as having negative effects on oneself and on behavior → Sum of the scores of items: 1, 2, 3, 9, 12, 13, 14, 15, 16, 17, 20, 22, 23, 24, 25 Factor 2: Uncertainty perceived as unfair and disruptive → Sum of the scores of items: 4, 5, 6, 7, 8, 10, 11, 18, 19, 21, 26, 27
Available alternatives
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