THE VALIDITY OF THE TWO MOST COMMON PREDICTORS OF ACHIEVEMENT IN LAW SCHOOL, UNDERGRADUATE GRADE POINT AVERAGE (GPA) AND THE LAW SCHOOL ADMISSIONS TEST (LSAT) SCORE, WERE STUDIED. DATA WERE COLLECTED FOR THE 855 INDIANA UNIVERSITY LAW SCHOOL MATRICULANTS DURING EIGHT CONSECUTIVE YEARS FROM 1957 THROUGH 1964. SEPARATE REGRESSION ANALYSES WERE MADE FOR INDIANA UNIVERSITY UNDERGRADUATES AND FOR NON-INDIANA UNIVERSITY UNDERGRADUATES SINCE DIFFERENCES WERE APPARENT BETWEEN THE TWO GROUPS. THE MULTIPLE CORRELATIONS (GPA PLUS LSAT) WERE 0.59 FOR INDIANA UNIVERSITY UNDERGRADUATES AND 0.64 FOR NON-INDIANA UNIVERSITY UNDERGRADUATES. THESE WERE OF SUFFICIENT MAGNITUDE TO WARRANT THE DEVELOPMENT OF EXPECTANCY TABLES AND REGRESSION EQUATIONS FOR USE IN THE SELECTION AND ADVISEMENT OF STUDENTS. THERE WAS A 60-PERCENT VARIANCE IN THE CRITERION NOT ASSOCIATED WITH THESE PREDICTORS. THE RESIDUAL SCORE VARIANCE WAS STUDIED TO REDUCE THE NONPREDICTED CRITERION VARIANCE. THREE VARIABLES WERE USED IN STUDYING RESIDUAL SCORE VARIANCE--UNDERGRADUATE MAJOR AREA AND TWO CLASSIFICATIONS OF TYPES OF INSTITUTIONS. FOR INDIANA UNIVERSITY UNDERGRADUATES, DIFFERENCES BETWEEN OBTAINED LAW GPA AND PREDICTED GPA WERE FOUND TO BE SIGNIFICANTLY RELATED TO THE UNDERGRADUATE MAJOR AREA. SEPARATE EXPECTANCY TABLES AND REGRESSION EQUATIONS WERE DEVELOPED. (HW)