Loading…

Protocol - Intolerance of Uncertainty Scale (IUS)

Add to Toolkit

Protocol Name from Source:

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

Availability:

Publicly available

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

Personnel and Training Required

None

Equipment Needs

None

Requirements

Requirement CategoryRequired
Average time of greater than 15 minutes in an unaffected individualNo
Major equipmentNo
Specialized requirements for biospecimen collectionNo
Specialized trainingNo

Mode of Administration

Self-administered

Life Stage:

Adolescent, Adult

Specific Instructions:

None

Research Domain Information

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.

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 Scale4926446CDE 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_Prevents_FirmOpinionPX650701010000Uncertainty stops me from having a firm opinion4N/A
PX650701_IntoleranceOfUncertainty_Scale_Means_DisorganizationPX650701020000Being uncertain means that a person is disorganized4N/A
PX650701_IntoleranceOfUncertainty_Scale_Makes_Life_TolerablePX650701030000Uncertainty makes life intolerable4N/A
PX650701_IntoleranceOfUncertainty_Scale_Unfair_NoGuaranteesPX650701040000It's unfair not having any guarantees in life4N/A
PX650701_IntoleranceOfUncertainty_Scale_Mind_Cant_RelaxPX650701050000My mind can't be relaxed if I don't know what will happen tomorrow4N/A
PX650701_IntoleranceOfUncertainty_Scale_Uneasy_Anxious_StressedPX650701060000Uncertainty makes me uneasy, anxious, or stressed4N/A
PX650701_IntoleranceOfUncertainty_Scale_UnforeseenEvents_UpsettingPX650701070000Unforeseen events upset me greatly4N/A
PX650701_IntoleranceOfUncertainty_Scale_Frustration_Incomplete_InformationPX650701080000It frustrates me not having all the information I need4N/A
PX650701_IntoleranceOfUncertainty_Scale_Living_Full_LifePX650701090000Uncertainty keeps me from living a full life4N/A
PX650701_IntoleranceOfUncertainty_Scale_LookAhead_Avoid_SurprisesPX650701100000One should always look ahead so as to avoid surprises4N/A
PX650701_IntoleranceOfUncertainty_Scale_UnforeseenEvents_Spoil_EverythingPX650701110000A small unforeseen event can spoil everything, even with the best of planning4N/A
PX650701_IntoleranceOfUncertainty_Scale_Uncertainty_ParalysisPX650701120000When it's time to act, uncertainty paralyses me4N/A
PX650701_IntoleranceOfUncertainty_Scale_Uncertain_Not_FirstRatePX650701130000Being uncertain means that I am not first rate4N/A
PX650701_IntoleranceOfUncertainty_Scale_Uncertain_Cant_GoForwardPX650701140000When I am uncertain, I can't go forward4N/A
PX650701_IntoleranceOfUncertainty_Scale_Uncertain_NotFunction_WellPX650701150000When I am uncertain I can't function very well4N/A
PX650701_IntoleranceOfUncertainty_Scale_Others_SeemTo_KnowPX650701160000Unlike me, others always seem to know where they are going with their lives4N/A
PX650701_IntoleranceOfUncertainty_Scale_Vulnerable_Unhappy_SadPX650701170000Uncertainty makes me vulnerable, unhappy, or sad4N/A
PX650701_IntoleranceOfUncertainty_Scale_Know_TheFuturePX650701180000I always want to know what the future has in store for me4N/A
PX650701_IntoleranceOfUncertainty_Scale_Cant_Stand_SurprisePX650701190000I can't stand being taken by surprise4N/A
PX650701_IntoleranceOfUncertainty_Scale_Smallest_Doubt_StopPX650701200000The smallest doubt can stop me from acting4N/A
PX650701_IntoleranceOfUncertainty_Scale_Organize_In_AdvancePX650701210000I should be able to organize everything in advance4N/A
PX650701_IntoleranceOfUncertainty_Scale_Uncertain_Lack_ConfidencePX650701220000Being uncertain means that I lack confidence4N/A
PX650701_IntoleranceOfUncertainty_Scale_Unfair_Others_KnowFuturePX650701230000I think it's unfair that other people seem sure about their future4N/A
PX650701_IntoleranceOfUncertainty_Scale_Uncertainty_Sleep_SoundlyPX650701240000Uncertainty keeps me from sleeping soundly4N/A
PX650701_IntoleranceOfUncertainty_Scale_GetAway_Uncertain_SituationsPX650701250000I must get away from all uncertain situations4N/A
PX650701_IntoleranceOfUncertainty_Scale_Ambiguities_StressPX650701260000The ambiguities in life stress me4N/A
PX650701_IntoleranceOfUncertainty_Scale_Anxious_Undecided_FuturePX650701270000I can't stand being undecided about my future4N/A