Protocol - Intolerance of Uncertainty Scale (IUS)
The Intolerance of Uncertainty Scale (IUS) includes 27 items relating to the idea that uncertainty is unacceptable, reflects badly on a person, and leads to frustration, stress, and the inability to take action. Participants rate items on a 5-point Likert scale ranging from 1 = "not at all characteristic of me" to 5 = "entirely characteristic of me." The protocol includes scoring instructions.
Intolerance of Uncertainty Scale (IUS)
You will find below a series of statements which describe how people may react to the uncertainties of life. Please use the scale below to describe to what extent each item is characteristic of you. Please circle a number (1 to 5) that describes you best.
Not at all characteristic of me
Somewhat characteristic of me
Entirely characteristic of me
1. Uncertainty stops me from having a firm opinion.
2. Being uncertain means that a person is disorganized.
3. Uncertainty makes life intolerable.
4. It’s unfair not having any guarantees in life.
5. My mind can’t be relaxed if I don’t know what will happen tomorrow.
6. Uncertainty makes me uneasy, anxious, or stressed.
7. Unforeseen events upset me greatly..
8. It frustrates me not having all the information I need.
9. Uncertainty keeps me from living a full life.
10. One should always look ahead so as to avoid surprises.
11. A small unforeseen event can spoil everything, even with the best of planning.
12. When it’s time to act, uncertainty paralyses me.
13. Being uncertain means that I am not first rate.
14. When I am uncertain, I can’t go forward.
15. When I am uncertain I can’t function very well.
16. Unlike me, others always seem to know where they are going with their lives.
17. Uncertainty makes me vulnerable, unhappy, or sad.
18. I always want to know what the future has in store for me..
19. I can’t stand being taken by surprise.
20. The smallest doubt can stop me from acting.
21. I should be able to organize everything in advance.
22. Being uncertain means that I lack confidence.
23. I think it’s unfair that other people seem sure about their future.
24. Uncertainty keeps me from sleeping soundly.
25. I must get away from all uncertain situations.
26. The ambiguities in life stress me.
27. I can’t stand being undecided about my future.
Scoring Instructions The IUS may be used as a unifactorial or a bifactorial assessment tool. To score the IUS as a unifactorial tool, add up the responses for each of the items. As a bifactorial tool, the IUS is used to assess the following two factors:
Factor 1: Uncertainty has negative behavioural and self-referent implications Factor 2: Uncertainty is unfair and spoils everything
To score Factor 1, add up the responses for items 1, 2, 3, 9, 12, 13, 14, 15, 16, 17, 20, 22, 23, 24, and 25
To score Factor 2, add up the responses for items 4, 5, 6, 7, 8, 10, 11, 18, 19, 21, 26, and 27
Personnel and Training Required
|Specialized requirements for biospecimen collection||No|
|Average time of greater than 15 minutes in an unaffected individual||No|
Mode of Administration
Adolescents and adults
The Intolerance of Uncertainty Scale (IUS) is a brief, widely used, reliable, and valid self-administered scale that is easy to administer, score, and interpret.
|caDSR Common Data Elements (CDE)||Eating Disorder Uncertain Intolerance Scale Assessment Scale||4926446||CDE Browser|
|Human Phenotype Ontology||Anxiety||HP:0000739||HPO|
|Human Phenotype Ontology||Abnormal fear/anxiety-related behavior||HP:0100852||HPO|
|Human Phenotype Ontology||Abnormal eating behavior||HP:0100738||HPO|
|Human Phenotype Ontology||Anorexia||HP:0002039||HPO|
|Human Phenotype Ontology||Bulimia||HP:0100739||HPO|
Process and Review
Protocol Name from Source
Buhr, K., & Dugas, M. K. (2002). The intolerance of uncertainty scale: Psychometric properties of the English version. Behaviour Research and Therapy, 40, 931-945.
Einstein, D. A. (2014). Extension of the transdiagnostic model to focus on intolerance of uncertainty: A review of the literature and implications for treatment. Clinical Psychology Science and Practice, 21, 280-300.
Sexton, K. A., & Dugas, M. J. (2009). Defining distinct negative beliefs about uncertainty: Validating the factor structure of the Intolerance of Uncertainty Scale. Psychological Assessment, 21, 176-186.
|Variable Name||Variable ID||Variable Description||dbGaP Mapping|
|PX650701260000||The ambiguities in life stress me||N/A|
|PX650701270000||I can't stand being undecided about my future||N/A|
|PX650701190000||I can't stand being taken by surprise||N/A|
|PX650701080000||It frustrates me not having all the more||N/A|
|PX650701250000||I must get away from all uncertain situations||N/A|
|PX650701180000||I always want to know what the future has in more||N/A|
|PX650701090000||Uncertainty keeps me from living a full life||N/A|
|PX650701100000||One should always look ahead so as to avoid more||N/A|
|PX650701030000||Uncertainty makes life intolerable||N/A|
|PX650701020000||Being uncertain means that a person is more||N/A|
|PX650701050000||My mind can't be relaxed if I don't know more||N/A|
|PX650701210000||I should be able to organize everything in advance||N/A|
|PX650701160000||Unlike me, others always seem to know where more||N/A|
|PX650701010000||Uncertainty stops me from having a firm opinion||N/A|
|PX650701200000||The smallest doubt can stop me from acting||N/A|
|PX650701120000||When it's time to act, uncertainty paralyses me||N/A|
|PX650701240000||Uncertainty keeps me from sleeping soundly||N/A|
|PX650701140000||When I am uncertain, I can't go forward||N/A|
|PX650701220000||Being uncertain means that I lack confidence||N/A|
|PX650701150000||When I am uncertain I can't function very well||N/A|
|PX650701130000||Being uncertain means that I am not first rate||N/A|
|PX650701060000||Uncertainty makes me uneasy, anxious, or stressed||N/A|
|PX650701040000||It's unfair not having any guarantees in life||N/A|
|PX650701230000||I think it's unfair that other people seem more||N/A|
|PX650701110000||A small unforeseen event can spoil more||N/A|
|PX650701070000||Unforeseen events upset me greatly||N/A|
|PX650701170000||Uncertainty makes me vulnerable, unhappy, or sad||N/A|
Intolerance of Uncertainty
August 7, 2015
A questionnaire to measure intolerance of uncertainty, an excessive tendency to consider it unacceptable for a negative event to occur.
Intolerance of uncertainty is associated with the etiology and maintenance of worry and certain psychiatric disorders, including eating disorders, anxiety disorders, depression, and obsessive compulsive disorders. Intolerance of uncertainty may also contribute to negative affect and lack of resilience.
Eating disorders, intolerance of uncertainty, Intolerance of Uncertainty Scale, IUS, worry, anxiety, stress, depression, anxiety, obsessive compulsive disorders, uncertainty, inability to act, negative affect