Intolerance of Uncertainty Scale (IUS-12; Carleton, Norton &
Asmundson, 2007)
The IUS-12 is a short form of the original 27-item IU Scale (IUS;
Freeston, Rhéaume, Letarte, Dugas & Ladouceur, 1994), consisting of 12
items relating to the emotional, cognitive and behavioural responses to
uncertainty, such as “unforeseen events upset me greatly” and“I can’t stand being taken by surprise”. Participants are asked
to indicate how much they agree with each response on a 1-5 Likert
scale, with scores of 1 corresponding to “not at all
characteristic of me” , through to 5 indicating a response of“very characteristic of me” . Therefore, scores range
from 12-60, with higher scores indicating higher IU. Carleton et al.,
(2007) suggest that this shortened version maintains internal
consistency, with high correlations with the original IUS.