A sample of male Investigative subjects (N=171) who completed the SDS as freshmen in 1970 was sent a questionnaire four years later. Results indicated that, for Investigative-type freshman males, the SDS has moderately high efficiency in predicting, four years later, their ultimate major and their immediate and future vocational plans. (Author)

Results showed strong empirical support for the model in that most subjects were working in environments congruent with their personality types. However, there was a lack of empirical support for the proposed relatedness among the environments in the model with regard to person-environment congruence. (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…

The appropriateness of raw score reports of human traits is questioned, especially in light of the support provided for Holland's theory by normed scores and the stereotypic career options suggested to males and females by raw scores. (Author)

The scales of the Self-Directed Search (SDS) were correlated with the scales of the Armed Forces Vocational Aptitude Battery (ASVAB) for a sample of 192 high school girls. The two devices have small to moderate correlations that indicate self-reported abilities and competencies have some concurrent validity. (Author)

Prediger confuses observations about the data with Holland's theoretical statement, performs some uninterpretable analyses, omits much relevant data, and provides an incomplete account of what psychometric authorities have said about raw scores in interest inventories. (Author)

Holland hypothesized that personality pattern consistency is related to vocational satisfaction, stability, and success. The viability of this key construct in Holland's theory of careers is examined in light of the expected relationship between level of consistency and frequency of occurrence of 2-letter Holland personality codes. Results are…

The author reviews the evidence for the beneficial effects of the Self-Directed Search (SDS), indicates that Hanson and Prediger have misinterpreted the theory, that their evidence is misleading, and that other evidence indicates that males and females of the same type are similar. The virtues of raw scores are summarized. (Author)

This paper offers some suggestions and cautions concerning the use of the Self-Directed Search (SDS) and the Strong-Campbell Interest Inventory (SCII). A rationale for separate scoring of interest and ability sections of the SDS is provided, i.e., that correlations between interest and abilities and between abilities and vocational satisfaction…