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…

Several propositions concerning methodology of personality research in educational settings are presented in the context of medical school students. Academic performance, attrition, student satisfaction, and personality and value changes are discussed in their direct relation to institutional goals and objectives. Personality factors are of…