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The analysis of natural language trait names and questionnaire scales has suggested that the five factors of Neuroticism, Extraversion, Openness, Agreeableness, and Conscientiousness constitute an adequate taxonomy of personality. An alterantive approach to comprehensive personality assessment based on clinical judgments is given by the California Q-Set (COS, Block, 1961). When self-Qsorts from 403 adult men and women were factored, the five factors closely resembled those found m adjectives, and showed convergent and discriminant validity against self-reports and peer- and spouse-ratings on measures of the fivefactor model Results were replicated when interviewer Q-sort ratings were examined for a subset of subjects. These findings strongly support the claim to comprehensiveness of the five-factor model. [ABSTRACT FROM AUTHOR]