The validity of some theoretically derived vocational diagnostic signs was examined to learn if a person's self-knowledge, occupational knowledge, and decision-making ability were predictable. The positive results imply some practical applications and the need for further theoretical investigation. (Author)

Discriminant analysis of Holland's Self Directed Search and Vocational Preference Inventory significantly improved the predictive validity of his classification scheme, over the traditional method of assigning high point codes. These results were obtained with both an initial and a replication sample of undergraduates pursuing various degrees. The…

Investigated the predictive efficiency of Holland's Self-Directed Search. In 1974, 126 vocationally undecided high school seniors were asked to express a career choice or indecision. A 1978 survey showed only 27 percent chose a career area not predicted by their 1974 SDS results. (Author)

Concern on how interest inventories are being used in career counseling and other preventive interventions has resulted in heightened sensitivity to the impact of interest inventories and the emergence of the concept exploration validity. Various aspects of exploration validity were assessed using three different interest inventories. The…

The psychological meaning and predictive value of a person's vocational aspirations were examined by applying Holland's typology to the vocational aspirations of high school juniors (N=1,005), college juniors (N=692), employed adults (N=140), and a second sample of college students studied over a 1 year interval (N=624). The aspirational data were…