The reliability, validity, and utility of various measures of career development as they are used with postsecondary deaf students were investigated. Career development was defined as the students' knowledge about various career areas, and secondly, the quality of the students' present career decision. Four commercially available measures of career development (modified for use with the deaf), a career knowledge test developed at the National Technical Institute for the Deaf (NTID), and a structured interview technique were used. The results indicated that scores on the commercially available tests as well as the NTID career knowledge test were moderately related to students' career knowledge. However, the NTID career knowledge test was more useful because it represented information about the specific careers which are included in NTID programs. Only the scores of the structured interview ratings were significantly related to the "goodness" of the students' career decision. A "good" career decision was defined as being carefully thought through, aware of the basic elements of the decision making process, realistic, and consistent with stated values. The results of this study suggest that the commercially available tests were not as useful as structured interviews and locally developed tests in assessing the knowledge and quality of deaf students' career decisions. The development of such measures, however, is costly. (Author/CTM)