Based on Carl Jung's theory, the MBTI (Myers-Briggs Type Indicator) is a self-report questionnaire designed to indicate psychological preferences in how people perceive the world and make decisions.
It categorises personalities into 16 types using four dichotomies: Extraversion vs. Introversion, Sensing vs. Intuition, Thinking vs. Feeling, and Judging vs. Perceiving. A four-letter acronym like INTP or ENFJ denotes each type. While popular in various settings, its scientific validity and ability to capture the complexity of personality are debated.