INTP (introversion, intuition, thinking, perceiving) is an abbreviation used in the publications of the Myers–Briggs Type Indicator (MBTI) to refer to one of the MBTI's 16 personality types. The MBTI assessment was developed from the work of prominent psychiatrist Carl G. Jung in his book Psychological Types. Jung proposed a psychological typology based on the theories of cognitive functions that he developed through his clinical observations. From Jung's work, others developed psychological typologies. Jungian personality assessments include the MBTI assessment, developed by Isabel Briggs Myers and Katharine Cook Briggs, and the Keirsey Temperament Sorter (KTS), developed by David Keirsey.
INTPs are marked by a quiet, stoic, modest, and aloof exterior that masks strong creativity and enthusiasm for novel possibilities. Their weaknesses include poor organization, insensitivity to social niceties, and a tendency to get lost in abstractions. Keirsey referred to INTPs as Architects, one of the four types belonging to the temperament he called the Rationals. INTPs are relatively rare, accounting for 2 - 5% of the U.S. population.