A battery of work sample tests, the Micro-TOWER System of Vocational Evaluation, has been developed for use in vocational and career education programs. Verbal, numerical, and perceptual motor skills useful in various occupations are measured. The system has been field tested in vocational rehabilitation centers, prisons, schools, and psychiatric hospitals. Data are presented on 100 adolescents and young adults from a New York City rehabilitation center who were given the tests. The instructions were played from a cassette tape, to minimize the amount of reading ability necessary to complete the test. The construct validity of these work samples, and the extent to which verbal ability affected performance, were examined. The results indicated that the work samples, with few exceptions , measured those skills which they were designed to measure,. In addition, verbal ability was minimally involved. Intercorrelations are presented for the various sections of Micro-TOWER, and for the skills measured by Micro-TOWER as compared to the Fundamental Achievement Series and the Employment Aptitude Survey. (Author/GDC)