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(p. 353) Obsessive-Compulsive Disorder 

(p. 353) Obsessive-Compulsive Disorder
(p. 353) Obsessive-Compulsive Disorder

Marco Del Giudice

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date: 21 October 2020

The chapter discusses obsessive-compulsive disorder (OCD), a condition defined by the presence of intrusive mental contents (obsessions) and repetitive behaviors (compulsions). After an overview of this disorder, its developmental features, and the main risk factors identified in the epidemiological literature, the chapter critically reviews existing evolutionary models and suggests new directions for research. The final section applies the criteria developed earlier in the book to classify the disorder within the fast-slow-defense (FSD) model and identify functionally distinct subtypes. The author proposes to distinguish between a female-biased defense activation subtype (D-OCD) primarily motivated by harm prevention and marked by elevated anxiety and/or disgust, and a male-biased slow spectrum subtype (S-OCD) primarily motivated by feelings of incompleteness and imperfection (“not just right” experiences).

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