Intolerance of Uncertainty Scale (IUS)

The Intolerance of Uncertainty Scale (IUS) assesses emotional, cognitive, and behavioral reactions to ambiguous situations, implications of being uncertain, and attempts to control the future.

ITEM CODING

The IUS has 27 items- none reversed scored.

The IUS may be used as a unifactorial or a bifactorial assessment tool.

SCALES

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

RESOURCE FILES

IUS Questionnaire pdf

IUS R syntanx

REFERENCES

Buhr et al, 2002

Sexton et al, 2009

Freeston, 1994