Abstract
Cognitive models of obsessive-compulsive disorder (OCD), although widely-supported, do not fully explain obsessive-compulsive (OC) symptoms. Mid-level constructs from acceptance and commitment therapy (ACT; e.g., experiential avoidance, cognitive fusion) may advance our understanding of OCD symptoms by adding explanatory power to existing conceptual models. The current study examined the extent to which mid-level ACT constructs account for unique variability in OCD symptom dimensions within a large treatment-seeking sample of individuals with OCD. In line with previous research in analogue samples, regression analyses revealed that although experiential avoidance and cognitive fusion showed associations with OCD symptoms, these constructs did not generally add to the prediction of OCD symptoms once general distress and obsessive beliefs were accounted for. An exception was that cognitive fusion was a unique predictor of unacceptable obsessional thoughts along with beliefs about importance of and need to control thoughts. These findings provide further support for the cognitive model of OCD as well as the notion that mid-level ACT constructs best relates to the unacceptable thoughts dimension of OCD. Conceptual and treatment implications, study limitations, and future directions are discussed.
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