Understanding Myers-Briggs Type Indicator (MBTI) in Terms of 'Jungian' Functions

Psychological-Type was the brain-child of Swiss psychiatrist, philosopher and humanist, Dr. Carl Jung, who uncovered these innate biases in his therapeutic work, a complete theory of which he published in his book Psychological Types, in 1921. It was the ingenuity of American mother-daughter team Katharine Briggs and Isabel Myers (1897-1980) that codified Jung's theory into a practical and usable format. Myers and Briggs developed the 4-letter code system we use today and although Jung had implicitly recognized the extraverted and introverted attitudes that mental processes could assume, their critical addition of the Judging/Perceiving dichotomy refined Jung's observations into a consistent and elegant system.