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Protocol - Intolerance of Uncertainty Scale (IUS)

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Description:

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.

Protocol:

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.

1 2 3 4 5

2. Being uncertain means that a person is disorganized.

1 2 3 4 5

3. Uncertainty makes life intolerable.

1 2 3 4 5

4. It’s unfair not having any guarantees in life.

1 2 3 4 5

5. My mind can’t be relaxed if I don’t know what will happen tomorrow.

1 2 3 4 5

6. Uncertainty makes me uneasy, anxious, or stressed.

1 2 3 4 5

7. Unforeseen events upset me greatly..

1 2 3 4 5

8. It frustrates me not having all the information I need.

1 2 3 4 5

9. Uncertainty keeps me from living a full life.

1 2 3 4 5

10. One should always look ahead so as to avoid surprises.

1 2 3 4 5

11. A small unforeseen event can spoil everything, even with the best of planning.

1 2 3 4 5

12. When it’s time to act, uncertainty paralyses me.

1 2 3 4 5

13. Being uncertain means that I am not first rate.

1 2 3 4 5

14. When I am uncertain, I can’t go forward.

1 2 3 4 5

15. When I am uncertain I can’t function very well.

1 2 3 4 5

16. Unlike me, others always seem to know where they are going with their lives.

1 2 3 4 5

17. Uncertainty makes me vulnerable, unhappy, or sad.

1 2 3 4 5

18. I always want to know what the future has in store for me..

1 2 3 4 5

19. I can’t stand being taken by surprise.

1 2 3 4 5

20. The smallest doubt can stop me from acting.

1 2 3 4 5

21. I should be able to organize everything in advance.

1 2 3 4 5

22. Being uncertain means that I lack confidence.

1 2 3 4 5

23. I think it’s unfair that other people seem sure about their future.

1 2 3 4 5

24. Uncertainty keeps me from sleeping soundly.

1 2 3 4 5

25. I must get away from all uncertain situations.

1 2 3 4 5

26. The ambiguities in life stress me.

1 2 3 4 5

27. I can’t stand being undecided about my future.

1 2 3 4 5

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

Protocol Name from Source:

This section will be completed when reviewed by an Expert Review Panel.

Availability:

Publicly available

Personnel and Training Required

None

Equipment Needs

None

Requirements
Requirement CategoryRequired
Major equipment No
Specialized training No
Specialized requirements for biospecimen collection No
Average time of greater than 15 minutes in an unaffected individual No
Mode of Administration

Self-administered questionnaire

Life Stage:

Adolescent, Adult

Participants:

Adolescents and adults

Specific Instructions:

None

Selection Rationale

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.

Language

English

Standards
StandardNameIDSource
Common Data Elements (CDE) Eating Disorder Uncertain Intolerance Scale Assessment Scale 4926446 CDE Browser
Process and Review

This section will be completed when reviewed by an Expert Review Panel.

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.

General References

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.

Protocol ID:

650701

Variables:
Export Variables
Variable NameVariable IDVariable DescriptionVersiondbGaP Mapping
PX650701_IntoleranceOfUncertainty_Scale_Ambiguities_Stress PX650701260000 The ambiguities in life stress me 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Anxious_Undecided_Future PX650701270000 I can't stand being undecided about my future 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Cant_Stand_Surprise PX650701190000 I can't stand being taken by surprise 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Frustration_Incomplete_Information PX650701080000 It frustrates me not having all the information I need 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_GetAway_Uncertain_Situations PX650701250000 I must get away from all uncertain situations 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Know_TheFuture PX650701180000 I always want to know what the future has in store for me 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Living_Full_Life PX650701090000 Uncertainty keeps me from living a full life 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_LookAhead_Avoid_Surprises PX650701100000 One should always look ahead so as to avoid surprises 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Makes_Life_Tolerable PX650701030000 Uncertainty makes life intolerable 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Means_Disorganization PX650701020000 Being uncertain means that a person is disorganized 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Mind_Cant_Relax PX650701050000 My mind can't be relaxed if I don't know what will happen tomorrow 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Organize_In_Advance PX650701210000 I should be able to organize everything in advance 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Others_SeemTo_Know PX650701160000 Unlike me, others always seem to know where they are going with their lives 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Prevents_FirmOpinion PX650701010000 Uncertainty stops me from having a firm opinion 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Smallest_Doubt_Stop PX650701200000 The smallest doubt can stop me from acting 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Uncertainty_Paralysis PX650701120000 When it's time to act, uncertainty paralyses me 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Uncertainty_Sleep_Soundly PX650701240000 Uncertainty keeps me from sleeping soundly 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Uncertain_Cant_GoForward PX650701140000 When I am uncertain, I can't go forward 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Uncertain_Lack_Confidence PX650701220000 Being uncertain means that I lack confidence 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Uncertain_NotFunction_Well PX650701150000 When I am uncertain I can't function very well 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Uncertain_Not_FirstRate PX650701130000 Being uncertain means that I am not first rate 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Uneasy_Anxious_Stressed PX650701060000 Uncertainty makes me uneasy, anxious, or stressed 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Unfair_NoGuarantees PX650701040000 It's unfair not having any guarantees in life 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Unfair_Others_KnowFuture PX650701230000 I think it's unfair that other people seem sure about their future 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_UnforeseenEvents_Spoil_Everything PX650701110000 A small unforeseen event can spoil everything, even with the best of planning 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_UnforeseenEvents_Upsetting PX650701070000 Unforeseen events upset me greatly 4 N/A
PX650701_IntoleranceOfUncertainty_Scale_Vulnerable_Unhappy_Sad PX650701170000 Uncertainty makes me vulnerable, unhappy, or sad 4 N/A
Research Domain Information
Measure Name:

Intolerance of Uncertainty

Release Date:

August 7, 2015

Definition

A questionnaire to measure intolerance of uncertainty, an excessive tendency to consider it unacceptable for a negative event to occur.

Purpose

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.

Keywords

Eating disorders, intolerance of uncertainty, Intolerance of Uncertainty Scale, IUS, worry, anxiety, stress, depression, anxiety, obsessive compulsive disorders, uncertainty, inability to act, negative affect