The analysis of natural language trait names and questionnaire scales has suggested that the five factors of Neuroticism, Extroversion, Openness, Agreeable-ness, and Conscientiousness constitute an adequate taxonomy of personality An alternative approach to comprehensive personality assessment based on clinical judgments is given by the California Q-Set (CQS, Block, 1961) When self-Q-sorts from 403 adult men and women were factored, the five factors closely resembled those found in adjectives, and showed convergent and discriminant validity against self-reports and peer- and spouse-ratings on measures of the five-factor 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