Stomaching uncertainty: Relationships among intolerance of uncertainty, eating disorder pathology, and comorbid emotional symptoms.

Intolerance of uncertainty (IU) is proposed to be a transdiagnostic vulnerability factor for various emotional disorders. There is robust evidence for the role of IU in anxiety and depressive disorders, but a paucity of evidence in eating disorders (ED). This study evaluated the factorial validity, internal consistency, and convergent validity of the Intolerance of Uncertainty Scale-Short Form (IUS-12; Carleton, Norton, & Asmundson, 2007), and examined whether IU is associated with ED pathology and comorbid emotional symptoms, in a clinical sample with EDs (N=134). A unitary factor solution provided the best fit. The IUS-12 showed excellent internal consistency, and good convergent validity. IU had an indirect effect on dietary restraint, purging, and emotional symptoms via overvaluation of eating, weight, and shape. The indirect effect was not significant for bingeing. Findings provide partial support for the notion that IU is a vulnerability factor for ED pathology and support the notion that IU is a transdiagnostic vulnerability factor for emotional symptoms. Limitations, research implications, and future directions for research are discussed.

A randomised controlled trial of group cognitive behavioural therapy for perfectionism.

Perfectionism is associated with symptoms of anxiety disorders, eating disorders and mood disorders. Treatments targeting perfectionism may reduce the symptoms of these disorders (Egan, Wade, & Shafran, 2011). This study is the first randomised controlled trial to investigate the efficacy of group cognitive behavioural therapy (CBT) for perfectionism. Forty-two participants with elevated perfectionism and a range of anxiety, eating and mood disorders were randomised to group CBT for perfectionism or a waitlist control. The treatment group reported significantly greater pre-post reductions in perfectionism, symptoms of depression, eating disorders, social anxiety, anxiety sensitivity and rumination, as well as significantly greater pre-post increases in self-esteem and quality of life compared to the waitlist control group. The impact of treatment on most of these outcomes was mediated by pre-post change in perfectionism (Concern over Mistakes). Treatment gains were reliable and clinically significant, and were maintained at 6-month follow-up. Findings support group CBT for perfectionism being an efficacious treatment for perfectionism and related psychopathology, as well as increasing self-esteem and quality of life.

The relationships between perfectionism, pathological worry and generalised anxiety disorder.

BACKGROUND: The relationships between perfectionism, pathological worry and generalised anxiety disorder (GAD) were investigated in a clinical sample presenting for treatment of perfectionism. METHOD: This study explored the utility of perfectionism in predicting pathological worry in a sample of individuals with elevated perfectionism and GAD (n = 36). Following this, the study examined whether perfectionism could predict a principal GAD diagnosis in the full sample (n = 42). RESULTS: Scores on the perfectionism dimensions Concern over Mistakes, Personal Standards, and Clinical Perfectionism significantly predicted pathological worry among participants with GAD after controlling for gender and depression. The perfectionism dimension Doubts about Actions significantly predicted whether individuals from the full sample received a principal diagnosis of GAD. CONCLUSIONS: These findings support certain dimensions of perfectionism having significant associations with pathological worry and GAD.