Internet-based cognitive behaviour therapy for perfectionism: Impact on different measures of perfectionism and psychopathology

Participants allocated to the treatment group will be registered as users on the Overcoming Perfectionism intervention program website which delivers an Internet based CBT for perfectionism (ICBT-P; Egan et al., 2014) program. The program consists of eight modules which has previous positive evaluations (A Rozental et al., 2017; Shafran et al., 2017; Wade et al., 2019). The eight modules comprising the program include: (1) understanding perfectionism, (2) your perfectionism cycle, (3) surveys and experiments, (4) new ways of thinking, (5) useful skills for managing unhelpful perfectionism, (6) self-criticism or self-compassion?, (7) re-examining the way we define our self-worth, and (8) staying well: managing unhelpful perfectionism in the long-term. Participants were asked to complete module 1 and were then encouraged to complete as many modules as the liked over 4 weeks. Each module took approximately 30 minutes to complete and addressed specific target areas important in the treatment of perfectionism. Intervention adherence and fidelity is controlled by having set online modules which are delivered to each treatment group participant in an identical fashion. However, the number of modules completed and the order of completion is left entirely to each treatment group participant. No other external assessment is conducted to determine adherence and fidelity or control for how each treatment group participant completes the modules.