ImR completed as first intervention then ImExp

ImExp completed then ImR

Imagery rescripting or imaginal exposure

A 42-item self-report scale to assess the severity and type of OCD symptoms; the OCI uses a 5-point Likert scale ranging from 0 (not at all) to 4 (extremely) and measures distress relating to 7 different subscales (washing, checking, doubting, ordering, obsessions, hoarding, and mental neutralizing). The total summed score of all items ranged between zero and 168. This measure will be completed at the beginning and end of each phase. Higher scores suggest more severe OCD symptomology.

A 10-item self-rated scale used to measure the severity of obsessive-compulsive symptoms and response to treatment; each item is scored from 0 (no symptoms) to 4 (extreme symptoms), with a total ranging from zero to 40. It will be completed at the beginning and end of each phase. Higher scores suggest more severe OCD symptomatology.

A 24-item self-rating scale used to measure the impact of intrusive prospective, personally relevant imagery. Each item is scored from 0 (no symptoms) to 4 (extreme symptoms), with a total ranging from zero to 96. Higher scores indicate greater symptomatology. This will be completed at the beginning and end of each phase.

Designed to measure the severity and frequency of obsessive-compulsive symptoms in individuals. The severity scale (Part B) of the FOCI was used in the project. Part B is a 5-item self-rating scale used to measure the frequency, severity, and impact of obsessive-compulsive symptoms; each item is scored from 0 (no symptoms) to 4 (extreme symptoms), with a total ranging from zero to 20. Higher scores indicate greater symptomology.