INFJs are the rarest type, and make up about 1–3% of the general population. INFJ (Introversion, Intuition, Feeling, Judging) is an initialism used in the publications of the Myers–Briggs Type Indicator (MBTI) to refer to one of the sixteen personality types. The MBTI assessment was developed from the work of prominent psychiatrist Carl Jung in his book Psychological Types. Jung proposed a psychologicaltypology based on the theories of cognitive functions that he developed through his clinical observations. According to previously questioning you, INFJ was very high among rhesus negatives. ENFJ was a close second.