The Myers–Briggs Type Indicator (MBTI) assessment is a psychometric questionnaire designed to measure psychological preferences in how people perceive the world and make decisions.
The questionnaire was created by Katharine Cook Briggs and Isabel Briggs Myers based on an extrapolation from the typological theories proposed by Carl Jung's 1921 book Psychological Types (English edition, 1923). Jung had theorized that there are four principal psychological functions by which humans experience the world - sensation, intuition, feeling, and thinking - and that one of these four functions is dominant most of the time.
The Myers-Briggs Type Indicator is used by 89 of the Fortune 100 companies. Although very popular in businesses around the world, the MBTI has been criticized by some academics as having methodological weaknesses, poor statistical validity and low reliability.