involving training in the generation of alternative beliefs. The main outcome was not significant, as there was no treatment effect on delusional distress or severity. There was, however, a significant order effect, as individuals who received D-cycloserine first had significantly reduced delusional severity, distress, and belief conviction as compared with individuals who received placebo first. This was interpreted by the authors as consistent with animal models in which D-cycloserine enhances learning only when accompanying the first exposure to training.
