Decision-making about intrusive thoughts: Relationships to attitudes towards them

Background and objectives: The present study investigated decision-making strategies about and evaluations of intrusive thoughts in OCD presented in hypothetical targets in vignettes in a non-clinical population. It was expected participants would be hastier in their decisions for violent and sexual thoughts than checking and contamination thoughts and find those thoughts more credible. In addition, it was expected that hastier decision-making would be related to poorer evaluation of the targets. It was further expected that higher OC traits would be related to collecting fewer data. Methods: Participants (N = 84) read four vignettes, two detailing a target with taboo intrusive thoughts and two detailing a target with non-taboo intrusive thoughts. Participants engaged in decision-making tasks about the targets before making decisions about the validity of the fears and rating their thoughts about the target. Results: There was a relationship between data gathering and evaluations of the targets, but only for targets with taboo thoughts - requesting fewer data was associated with believing that the violent and sexual thoughts were true and evaluating them more negatively. Participants with higher OC traits gathered fewer data before deciding on three of the four tasks. Limitations: The sample was non-clinical and homogenous; stimuli may have been unbalanced across vignettes. Conclusions: Reasoning about and attitudes about taboo intrusive thoughts appear to be considerably related.