The data and findings of a four-year study designed to organize a battery of psychological tests for assessing the vocational adjustment of adult deaf and to establish the validity of the individual tests, as well as provide some information regarding their most economic and productive potential use, are presented. The study population was all possible adult deaf in the State of Oregon. The criteria for selection were: between 24 and 54 years old, with a pure tone hearing loss of at least 50 decibels in their unaided superior ear, and employable for three years prior to being contacted for inclusion in the study. A total of 483 adult deaf participated in the study. The tests used were the General Aptitude Test Battery, Bender Visual Motor Gestalt Test, Hearing Loss, Weingarten Picture Inventory, Closure Flexibility (Gottschaldt) Test, Gates Reading Survey, Craig Lipreading Inventory, Oregon Manual Communication Test, Berger Block Test, and Holdt Speech Characteristics Test. Norms for employable deaf adults for the tests used are provided. A minimum test battery is supplied. Results of the study show that the adult deaf participate cooperatively in research programs, are less competitive than the hearing population, show wide individual differences, differences among the employable deaf in personal history and test behavior are related to differences in work adjustment, and vocational adjustment is facilitated by identifying practical occupational objectives. Fifty tables provide the study data, and 39 plots are given of profiles of subject and test score variables. The report concludes with 14 appendixes and 154 references. (DB)