Final answer:
Raymond Cattell developed the 16PF questionnaire in the 1940s, condensing Gordon Allport's trait list. The 16PF offers valuable insights into personality traits and assessment.
Explanation:
Raymond Cattell created the Sixteen Personality Factor Questionnaire (16PF) in the late 1940s based on 16 factors, including general intelligence. He reduced Gordon Allport's list of traits to 171, and through factor analysis, identified the primary human personality factors to be sixteen.
The 16PF was described in the Handbook for the Sixteen Personality Factor Questionnaire, providing insight into individuals' personalities. Cattell's work contributed significantly to the understanding of personality traits and assessment.
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