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Inductive reasoning and doubt in obsessive compulsive disorder.

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Area of Science:

  • Cognitive psychology
  • Clinical psychology
  • Neuroscience

Background:

  • Previous research indicates individuals with obsessive-compulsive disorder (OCD) place greater importance on alternative conclusions compared to healthy controls (HC).
  • This heightened importance of alternatives leads to increased doubt regarding initial conclusions in individuals with OCD.

Purpose of the Study:

  • To replicate and extend previous findings on doubt generation in OCD.
  • To investigate the conditions that facilitate doubt in individuals with OCD.

Main Methods:

  • Eighteen participants with OCD and 16 HC completed the Reasoning with Inductive Arguments Task (RIAT).
  • Doubt was operationalized as a change in confidence towards a conclusion after presentation of alternative conclusions.
  • The study compared the impact of supporting and contradicting alternative conclusions, and neutral versus OCD-relevant content.

Main Results:

  • Both OCD and HC groups showed decreased confidence after contradicting conclusions.
  • Only the HC group increased confidence when presented with supporting conclusions.
  • In the OCD group, decreased confidence correlated with OCD symptom severity.

Conclusions:

  • Doubt generation may be a cognitive mechanism contributing to obsessional doubting in OCD.
  • The Reasoning with Inductive Arguments Task (RIAT) shows potential for adaptation to study OCD subtypes.