The Myers-Briggs Type Indicator (MBTI) assessment is designed as psychometric questionnaire used to measure psychological preferences in how people perceive the world and make decisions. These preferences were first established as typological theories by Carl Gustav Jung. Jung theorized that there are four principal psychological functions by which people use to experience the world. They are sensation, intuition, feeling, and thinking. One of these four functions would be dominant most of the time.
The original developers of the MBTI were Katharine Cook Briggs and her daughter, Isabel Briggs Myers. They turned their interest of human behavior, after studying extensively Jung's works, into a devotion of turning the theory of psychological types to practical use. They began creating the MBTI during World War II, believing that a knowledge of personality preferences would help women who were entering the industrial workforce for the first time to identify the sort of war-time jobs where they would be "most comfortable and effective". The initial questionnaire grew into the Myers-Briggs Type Indicator, which was first published in 1962. The MBTI focuses on normal populations and emphasizes the value of naturally occurring differences.