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Internet-based cognitive behaviour therapy for perfectionism: More is better but no need to be prescriptive
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Number of Authors: 7 (English)In: Clinical Psychologist, ISSN 1328-4207, E-ISSN 1742-9552Article in journal (Refereed) Epub ahead of print
Abstract [en]

Background The current study explored whether higher- (up to 8 modules) versus lower-dose (3 or less modules) unguided internet Cognitive Behaviour Therapy for perfectionism (ICBT-P) was more effective, and the best method to promote higher dosage. Methods Two sequential randomised ICBT-P studies were conducted with participants who self-identified as having difficulties with perfectionism; in the first participants (N = 51) received 3-module ICBT-P or wait-list, and in the second participants (N = 55) received fixed (asked to complete all 8 modules two per week over 4-weeks) or flexible format (after completing the first psychoeducational module, participants decided how many/in what order they completed the modules). We examined impact on our primary variables, perfectionistic concerns and standards, and secondary outcomes of negative affect, body image flexibility, and self-efficacy. Results More modules were completed in the higher- (M modules = 4.36, SD = 3.29) versus lower-dose (M = 1.96, SD = 1.23) ICBT-P, d = 0.86 (95% confidence interval: 0.39, 1.34). The latter impacted perfectionism but not secondary outcomes; the former impacted all outcomes (except for self-efficacy), and within-group effect size improvements were double in the high- compared to low-dose ICBT-P. There was no difference between the fixed and flexible formats in terms of the number of modules completed or impact. Conclusions We can offer a patient-centred approach to ICBT-P that is effective, while suggesting completion of more modules can result in larger, more pervasive improvements. ANZCTR Trial Number: ACTRN12619000147189.

Keywords [en]
body image flexibility, fixed or flexible format, internet cognitive-behavioural therapy, negative affect, perfectionism
National Category
Psychology
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URN: urn:nbn:se:su:diva-170802DOI: 10.1111/cp.12193ISI: 000474411100001OAI: oai:DiVA.org:su-170802DiVA, id: diva2:1338369
Available from: 2019-07-22 Created: 2019-07-22 Last updated: 2019-07-22

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Wade, Tracey D.de Valle, Madelaine K.Carlbring, Per
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