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Danger ideation reduction therapy (DIRT) for obsessive-compulsive washers. A controlled trial
1Department of Behavioural Sciences, Faculty of Health Sciences, University of Sydney, Lidcombe, Australia.
Behaviour Research and Therapy
|August 26, 1998
Summary
Danger Ideation Reduction Therapy (DIRT) significantly reduced obsessions and compulsions in individuals with Obsessive-Compulsive Disorder (OCD) by targeting contamination fears. This cognitive approach proved effective in a controlled trial, offering a new management strategy for OCD.
Area of Science:
- Psychiatry and Behavioral Sciences
- Clinical Psychology
- Cognitive Behavioral Therapy Research
Background:
- Obsessive-Compulsive Disorder (OCD) is often characterized by contamination fears and washing compulsions.
- Existing treatments for OCD, such as exposure and response prevention, may not be suitable for all individuals.
- Cognitive-focused therapies are being explored as alternative or supplementary interventions for OCD.
Purpose of the Study:
- To evaluate the efficacy of Danger Ideation Reduction Therapy (DIRT) in treating OCD symptoms, specifically those related to washing and contamination.
- To compare the effectiveness of DIRT against a waitlist control group in a controlled clinical trial.
- To assess the impact of DIRT on cognitive expectancies related to contamination and perceived danger.
Main Methods:
- A controlled trial involving 21 participants with OCD and contamination concerns.
- The experimental group received eight weekly group sessions of DIRT, focusing on cognitive restructuring and reducing danger expectancies.
- The control group was placed on a waitlist. Symptom severity was assessed using standardized inventories (Maudsley Obsessional-Compulsive Inventory, Leyton Obsessionality Inventory, Beck Depression Inventory) at pre-treatment, post-treatment, and three-month follow-up.
Main Results:
- Participants receiving DIRT showed significantly greater reductions in OCD symptoms and depression compared to the waitlist control group.
- Improvements were observed across all measured variables, including obsessionality, compulsions, and self-rated severity.
- No significant differences in symptom change were found between post-treatment and follow-up, suggesting sustained effects.
Conclusions:
- DIRT is an effective cognitive intervention for reducing obsessions and compulsions in individuals with OCD, particularly those with contamination fears.
- The findings support the role of cognitive factors in maintaining OCD and suggest that targeting danger expectancies can be a viable therapeutic strategy.
- DIRT offers a promising alternative or adjunct to traditional behavioral therapies for managing OCD.