Intolerance of Uncertainty in Youth: Psychometrics of the Intolerance of Uncertainty Index-A for Children

Abstract Intolerance of uncertainty (IU) is a cognitive vulnerability for pathological anxiety. The current study adapted the Intolerance of Uncertainty Index-A for Children (IUI-A-C), and created a single-item Intolerance of Uncertainty Clinician-Rated Index (IUCR), both of which assess a youth’s general inability to endure uncertainty. Psychometric properties of these two measures were evaluated. Participants were 146 youth aged 7–17 years seeking treatment for anxiety. The IUI-A-C evidenced individual item performance (i.e., correlations between each item and the total remainder score > .40, ps