As part of the United States Army's Project A, research has been conducted to develop and field test a battery of experimental tests to complement the Armed Services Vocational Aptitude Battery in predicting soldiers' job performance. Project A is the United States Army's large-scale manpower effort to improve selection, classification, and utilization of enlisted personnel. Findings from an extensive literature review and associated expert judgments and administration of a preliminary battery of "off-the-shelf" measures guided the development of new tests. Three major types of tests were prepared, namely, paper-and-pencil tests of cognitive ability; computer-administered tests of perceptual and psychomotor abilities; and paper-and-pencil inventories measuring temperament, biographical data, and vocational interests. After iterative pilot tests and revisions, the measures were field tested. Analysis indicted that the new tests had adequate to excellent psychometric qualities, were relatively unique, and were not unduly affected by practice or by faking in an applicant setting. The resulting trial battery contains six cognitive tests; 10 computer-administered perceptual and psychomotor tests; and two inventories measuring temperament, biographical factors, and interests. The battery is being used in the next Project A phase, which involves concurrent validation to evaluate predictor measures against subsequent job performance. (TJH)