10. Follow-up analyses Besides mixed logistic regressions, metacognitive performance will be analyzed using second-order signal detection theory: meta-d' will reflect the amount of perceptual evidence available when performing confidence judgments. Confidence biases will also be computed with receiver operating characteristic curves (ROC): the area between the ROC and major diagonal will be divided by the minor diagonal, and confidence bias will be defined as the log ratio of the lower and upper area. An ANOVA with group and appropriate covariates as between-subject factors will test for a decrease in metacognitive efficiency and an increase in confidence bias in patient vs. control participants.