The Vocational Instruction, Training and Assessment (VITA) Project conducted a study to determine whether a battery of tests used with a sample of handicapped students enrolled in vocational education program(s) could aid in predicting success in vocational training. Procedures, instruments, and student samples were selected to provide data on (1)…

The problem associated with validating an admissions test when such validation is based solely on the scores of the accepted, and therefore, restricted, group of applicants is demonstrated. A correction formula that estimates the correlation between admission test scores and a subsequent measure of performance for the entire group of applicants is…

This report was written to provide guidance in the development and evaluation of alternative instructional approaches that hold promise of improving instructional effectiveness. The main focus of the report is on how to identify and test interactive relationships between individual differences among learners and instructional conditions or…