abbr. (context grammar English) interjection
INTJs are one of the rarest of the sixteen psychological types and account for approximately 2-4% of the population.
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 instrument, developed by Isabel Briggs Myers and Katharine Cook Briggs, and the Keirsey Temperament Sorter, developed by David Keirsey. Keirsey referred to INTJs as Masterminds, one of the four types belonging to the temperament he called the Rationals.