A meta-analysis of studies was conducted on the validity of the Structured Clinical Interview for DSM (SCID) as diagnostic tools for the detection of psychiatric disorders: Schizophrenia, Bipolar disorder, major depressive disorder and Substance-related disorders. Looking at sensitivity and specificity, the SCID is seen to perform well, with to high values for all four diagnosis included in the study. In general, SCID was better used in detecting thrue negatives or the non-cases, as shown in higher specificities as compared to sensitivities.