'16PF' means the 16 Personality Factor Model, or a related questionnaire.
The 16PF Model identifies one from 16 'primary factors' to describe people's most influential personality trait.
The primary personality traits are:
- Warmth, reasoning, emotional stability, dominance, liveliness, rule-consciousness, social boldness, sensitivity, vigilance, abstractedness, privateness, apprehension, openness to change, self-reliance, perfectionism and tension.
The originator of 16PF was Raymond B Cattell, who published an early version of his questionnaire in 1949.