The Myers-Briggs Type Indicator (MBTI) is a personality assessment tool developed in the 1940s based on Carl Jung's theory of psychological types. It assesses preferences in four dichotomies: Extraversion vs Introversion, Sensing vs Intuition, Thinking vs Feeling, and Judging vs Perceiving. Katherine Briggs and her daughter Isabel Myers created the MBTI to help people better understand individual differences. The MBTI is the most widely used personality indicator in the world and provides self-awareness that can help with self-management and understanding behavior trends. However, it does not measure traits like IQ or psychiatric disturbances.