The purpose of this study was to attempt to identify those factors that influence a high school student's success on the Advanced Placement (AP) Examinations by examining and comparing the variables contained in the high school records of former AP participants. A total of 248 high school students participated in the research. The criterion for success was the English AP Examination score. Variables which are likely to serve as a guide for potential success on the AP Examinations consisted of 30 separate factors which include a wide variety of background data on academic achievement, academic aptitude, academic performance, and several non-cognitive factors. Major conclusions were: (1) For the successful students, the mean of the average English marks (grades 7-11) corresponded with the mean of the Honor Point Average (HPA); (2) HPA and College Entrance Examination Board Scholastic Test (CEEB-SAT) Verbal Score were both found to be highly significant indicators of success; (3) Social Studies marks and National Merit Scholarship Tests Social Studies Scores were found to be better predictors of success than were English marks; (4) Responsibility and seriousness of purpose were found to be important qualifications for success; (5) IQ test scores were found to be statistically significant indicators of success; (6) Extracurricular activities were found to have no relationship to success. (Author/CK)