The objective of this study was to examine the predictive value of trainees' previous experience and performance at an introductory course in Cognitive Therapy for their subsequent success in an advanced course. From 203 completers of an introductory course during seven consecutive years 32 participated in an advanced course. In a linear regression analysis previous clinical and psychotherapeutic experience as well as performance at the introductory course were studied as predictors for trainees' success in the advanced course. Performance at the introductory course was the only significant predictor of trainees' successful completion of the advanced course. An introductory course might help to select those trainees who have the desired qualities to succeed in a formal psychotherapeutic training program.