Developing scales measuring disorder-specific intolerance of uncertainty (DSIU): A new perspective on transdiagnostic
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Intolerance of uncertainty (IU) is a construct of growing prominence in literature on anxiety disorders and major depressive disorder. Existing measures of IU do not define the uncertainty that respondents perceive as distressing. To address this limitation, we developed eight scales measuring disorder-specific intolerance of uncertainty (DSIU) relating to various anxiety disorders and major depressive disorder. We used exploratory factor analysis and item characteristic curves in two large undergraduate samples (Ns = 627 and 628) to derive eight three-item DSIU scales (24 items total) that exhibited excellent psychometric properties. Confirmatory factor analysis supported the factor structures of the scales and the transdiagnostic nature of IU. Each scale predicted unique variance in its respective symptom measure beyond a traditional measure of IU. DSIU represents a theoretically proximal and causal intermediary between known vulnerability factors and disorder symptomatology. The DSIU scales can be used to advance theories of psychopathology and inform case conceptualization and treatment planning.
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Trait versus situation-specific intolerance of uncertainty in a clinical sample with anxiety and depressive disordersMahoney, A.; McEvoy, Peter (2012)Intolerance of uncertainty (IU) has been most heavily implicated in the development and maintenance of generalised anxiety disorder; however, recent research has supported the transdiagnostic conceptualisation of IU by ...
To be sure, to be sure: intolerance of uncertainty mediates symptoms of various anxiety disorders and depressionMcEvoy, Peter; Mahoney, A. (2012)The Intolerance of UncertaintyModel was initially developed as an explanation for worry within the context of generalized anxiety disorder. However, recent research has identified intolerance of uncertainty (IU) as a ...
Achieving certainty about the structure of intolerance of uncertainty in a treatment-seeking sample with anxiety and depressionMcEvoy, Peter; Mahoney, A. (2011)Evidence is accumulating that intolerance of uncertainty (IU) may be a transdiagnostic maintaining factor across the anxiety disorders and depression. However, psychometric studies of the most commonly used measure of IU ...