Experimental tests-Mechanical Knowledge (tools), Craftsman Aptitude-Mechanics, Craftsman Apti tude-Construction, and seven self-report person ality measures-were administered to samples of trainees in the Automotive Maintenance Helper (MOS 630) course at three training centers. The experimental tests were evaluated and compared with operational ACB tests for effectiveness in predicting written test score, performance test score, and cadre estimates of future performance in an Army assignment. The ACB Automotive In formation Test was the most heavily weighted test in composites predictive of aspects of suc cess in the course. In predicting the estimated job success criterion, however, the experi mental Mechanical Knowledge Test and the Crafts man Aptitude tests were somewhat more effec tive than the ACB Mechanical Aptitude Test, suggesting the promise of such tests in differ ential classification for mechanical jobs. (Author).

Experimental tests-Mechanical Knowledge (tools), Craftsman Aptitude-Mechanics, Craftsman Apti tude-Construction, and seven self-report person ality measures-were administered to samples of trainees in the Automotive Maintenance Helper (MOS 630) course at three training centers. The experimental tests were evaluated and compared with operational ACB tests for effectiveness in predicting written test score, performance test score, and cadre estimates of future performance in an Army assignment. The ACB Automotive In formation Test was the most heavily weighted test in composites predictive of aspects of suc cess in the course. In predicting the estimated job success criterion, however, the experi mental Mechanical Knowledge Test and the Crafts man Aptitude tests were somewhat more effec tive than the ACB Mechanical Aptitude Test, suggesting the promise of such tests in differ ential classification for mechanical jobs. (Author).