The purpose of this study was to gather additional evidence pertinent to the construct validity of standardized patient-based clinical performance examinations. Specifically, the study determined whether students who indicated they had previously read about, seen, or worked up a case on the examination performed differently on that case from those students who had not. Overall, it was found that students with previous reading or direct experiences with cases on the test tended to have higher case mean scores on those cases than those who had not. These results demonstrated that scores on standardized patient-based performance examinations are sensitive to the examinees various learning experiences. 1994, Taylor & francis group, llc. All rights reserved.