The relative influence of selected life history experiences on the development of three vocational types (investigative, social, and enterprising) proposed by J. L. Holland is studied using causal modeling procedures. The lack of explicitness in the developmental postulates of Holland's theory is seen as a major deficiency. Among the principal…

During the orientation program for freshmen at the State University of New York at Buffalo in 1973, students were surveyed by questionnaire. In 1976 a followup survey was sent to a random sample of 700 of those students, 40 percent of whom responded. The latter survey consisted of 301 multiple choice items, 127 of which are identical to the…