Journal
JOURNAL OF ABNORMAL PSYCHOLOGY
Volume 109, Issue 4, Pages 673-678Publisher
AMER PSYCHOLOGICAL ASSOC
DOI: 10.1037/0021-843X.109.4.673
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The study examined whether obsessive-compulsive (OC) checkers have reduced confidence in their knowledge. OC checkers were compared with panic disorder (PD) patients and nonpatient controls using a calibration-of-knowledge procedure. Participants completed a general knowledge questionnaire, rated their confidence in each answer, and estimated the total number of correct answers. These responses were converted to 2 measures of confidence relative to performance-over/underconfidence and over/underestimation, OC checkers had lower scores than nonpatients did on both measures, whereas the PD patients did not differ from tither group. For the OC checkers, relative confidence was inversely related to the severity of obsessions. The authors speculate that confidence may depend on a confirmation bias in testing hypotheses and that the reduced confidence in OC checkers may reflect a disconfirmation bias in this population.
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