Question: Who developed the sixteen personality factor questionnaire (16 pf) ​?
Answer: Raymond B. Cattell
Maurice Tatsuoka
Herbert Eber
Disambiguated annotations:
answer: Raymond B. Cattell, Maurice Tatsuoka and Herbert Eber
answer: Raymond B. Cattell, Maurice Tatsuoka, and Herbert Eber
answer: Raymond B. Cattell, Maurice Tatsuoka and Herbert Eber