Abstract
The performance of three consecutive classes of students admitted to the Colleges of Medicine and Medical Sciences at King Faisal University was studied. All students took the high school graduation examination and sat the college admission test. It was found that performance on the admission test was a better predictor than high school grades in the first two levels of the medical curriculum. However, performance in a combination of certain high school and admission test subjects was a more powerful predictor of students' achievement at all levels. This study indicates that the college admission test is a useful additional tool in the process of medical student selection at this college. Further studies are needed, however, for the formulation of general recommendations.