Uncertainty Intolerance

Posted on October 8, 2020 / 5 Listing verified by admin as genuine
Listing Type : English Scale

Uncertainty Intolerance

Intolerance of Uncertainty Scale – Short Form (IUS-12)

Author of Tool:

Carleton, Norton, & Asmundson

Key references:

Freeston, M., Rhéaume, J., Letarte, H., Dugas, M. J., & Ladouceur, R. (1994). Why do people worry? Personality and Individual Differences, 17, 791-802. doi: 10.1016/0191-8869(94)90048-5Carleton, R. N. (in press). The intolerance of uncertainty constructs in the context of anxiety disorders: Theoretical and practical perspectives. Expert Review of Neurotherapeutics.

Primary use / Purpose:

The IUS-12 is a short version of the original 27-item Intolerance of Uncertainty Scale (Freeston, Rhéaume, Letarte, Dugas, & Ladouceur, 1994) that measures responses to uncertainty, ambiguous situations, and the future (Carleton, in press). The 12 items are rated on a 5-point Likert scale ranging from 1 (not at all characteristic of me) to 5 (entirely characteristic of me).


The Intolerance of Uncertainty Scale – Short Form (IUS-12) has a strong correlation with the original scale, rs = .94 to .96 (Carleton, Norton, et al., 2007; Khawaja & Yu, 2010), a continuous latent structure (Carleton, Weeks et al., 2012), and has been shown to have two factors (Carleton, Norton, et al., 2007; McEvoy & Mahoney, 2011), prospective IU (7 items; e.g., “I can’t stand being taken by surprise”) and inhibitory IU (5 items; e.g., “When it’s time to act, uncertainty paralyzes me”), both with identically high internal consistencies, α = .85 (Carleton, Norton, et al., 2007).

The IU construct has been found to be ubiquitous, with scores comparable across anxiety disorders and depression (Carleton, Mulvogue et al., 2012). The IUS-12 was selected to measure IU because it is comparable to, but briefer than, the longer original IUS (Khawaja & Yu, 2010) and the new symptom-focused Intolerance of Uncertainty Index (IUI; Carleton, Gosselin, & Asmundson, 2010; Gosselin et al., 2008).


Good convergent and discriminant validity, as well as internal consistency, have been demonstrated by the total score and both subscale scores (Carleton, Norton, et al., 2007; McEvoy & Mahoney, 2011).


Other Information:

Prospective Anxiety Subscale: sum of items 1,2,4,5,8,9,11
Inhibitory Anxiety Subscale: the sum of items 3,6,7,10,12
Total Score: the sum of all items


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