This article celebrates the 50th anniversary of the introduction of John L. Holland's (1959) theory of vocational personalities and work environments by describing the theory's development and evolution, its instrumentation, and its current status. Hallmarks of Holland's theory are its empirical testability and its user-friendliness. By…

This study examined the career aspirations and self-perceptions of University Honors Program students at Indiana State University. The current trend in education, especially gifted and talented education, focuses on science, technology, engineering, and mathematics (STEM). How has this impacted the gifted and talented population when they become…

This study represents the first empirical test of the vocational personality of US school psychologists. Specifically, we investigated the personality of school psychologists using Holland's (1997) well-researched theory of vocational personalities and work environments. The sample consisted of 241 randomly selected members of the National…

Holland influenced practice and research in career development by contributing a clear theory useful in organizing information about individuals and career alternatives and for understanding individuals' entry and persistence in occupational and other environments. His theory was repeatedly revised in response to evidence. As Holland's own career…

Findings suggest that a woman will obtain a different Holland code depending on what instrument or what set of scales within an instrument is used to establish that code. This phenomenon could reflect sample characteristics equally as much as any bias in the measures. (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…

A sample of 358 men and 360 women took the Self-Directed Search (SDS), a vocational guidance tool developed by Holland based on his theory of vocational choice. Holland had found that in the occupational domain the factor loadings on the Realistic, Investigative, Artistic, Social, Enterprising, and Conventional scales fit a hexagonal paradigm…