Domains of competency to stand trial

Attempts to improve the clinical rigor of competency to stand trial evaluations have resulted in the development of several psycholegal measures. Among the most widely used of these measures are the Competency Screening Test (CST), the Fitness Interview Test (FIT), and the Georgia Court Competency Test—Mississippi State Hospital Revision (GCCT-MSH). To examine the theoretical domains of the competency construct as assessed by these measures, a series of exploratory factor analyses were performed combining previously reported data on the FIT and GCCT-MSH with a new outpatient sample of 353 court referrals. For the CST, data from a previous sample were compared to the original validation study. Of the three measures, only the GCCT-MSH showed evidence of stable, independent factors. A comparison of the GCCT-MSH to theDusky standard suggested a need to further develop empirical measures to better represent underlying constructs related to the defendant-attorney relationship and defendant's participation in his or her defense.