Obsessive-Compulsive Spectrum Disorders: Diagnosis, Theory, and Treatment

David A. Clark, Gregoris Simos

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)


Obsessive-compulsive disorder (OCD) is one of the most chronic and severe of the anxiety disorders, affecting 2-3% of the general population. This chapter presents an overview of current research into the psychopathology and treatment of OCD and obsessive-compulsive spectrum disorders (OCSDs). It begins by considering the phenomenology of obsessions and compulsions, with particular focus on the debate for reclassifying OCD with the spectrum disorders that would be distinct from the other anxiety disorders. It then discusses recent cognitive behavioral formulations of OCD and spectrum disorder as well as the empirical evidence for the cognitive appraisal perspective. The chapter concludes with a review of pharmacotherapy and cognitive behavioral treatments for OCD and OCSDs, and whether mindfulness and acceptance and commitment therapy (ACT) offer any promise for revitalizing the treatment approach to these conditions. This edition first published 2013

Original languageEnglish
Title of host publicationCBT for Anxiety Disorders
Subtitle of host publicationA Practitioner Book
PublisherJohn Wiley and Sons
Number of pages31
ISBN (Print)9780470975527
Publication statusPublished - 17 Mar 2013


  • Acceptance and commitment therapy (ACT)
  • Cognitive behaviour therapy (CBT)
  • Obsessive-compulsive disorder (OCD)
  • Obsessive-compulsive spectrum disorders (OCSDs)
  • Pharmacotherapy
  • Phenomenology
  • Psychopathology

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    Clark, D. A., & Simos, G. (2013). Obsessive-Compulsive Spectrum Disorders: Diagnosis, Theory, and Treatment. In CBT for Anxiety Disorders: A Practitioner Book (pp. 25-55). John Wiley and Sons. https://doi.org/10.1002/9781118330043.ch2