title: Obsessive compulsive features predict cautious decision strategies.
abstract: BACKGROUND
  Obsessive compulsive disorder (OCD) is occasionally characterized by decision-making deficits. Compared to the isolated analysis of the choice and response times, characterizing decision outputs at the level of latent processes can be a more powerful approach in revealing differences, even in subclinical cases. We hypothesized that participants with higher obsessive compulsive (OC) features would set their decision thresholds higher and thus make more cautious decisions.
  
  
  METHODS
  We used a perceptual two-alternative forced-choice (2AFC) task (dot motion discrimination) to test this hypothesis in a non-clinical sample ( N = 74). We fitted the data with the diffusion model and evaluated the optimality of decision outputs. We also conducted exploratory analyses to reveal which subscales best predicted the differences at the level of latent decision processes.
  
  
  RESULTS
  Higher OC total scores in Maudsley and Padua scales significantly predicted higher threshold settings (cautiousness). The follow-up exploratory analyses with subscale scores showed that checking and rumination tendencies predicted higher threshold settings whereas washing tendency predicted faster non-decision times.
  
  
  CONCLUSIONS
  Our primary results showed that participants with higher degrees of OC features exhibit more cautious decision making. Our exploratory analyses also revealed distinctions based on different types of OC features in both controlled (cautiousness in decision making) and automatic (faster non-decision times) elements of the decision process.
authors.affiliation: Department of Psychology, Koç University, Istanbul, Turkey.
authors.forename: Ceyla
authors.initials: C
authors.lastname: Erhan
authors.affiliation: Department of Psychology, Koç University, Istanbul, Turkey.
authors.forename: Fuat
authors.initials: F
authors.lastname: Balcı
keywords: Decision making; Drift diffusion model; Obsessive-compulsive disorder; Speed-accuracy tradeoff