Personality Type or Psychological Type are terms most commonly associated with the model of personality development created by Isabel Briggs Myers, the author of the world's most widely used personality inventory, the MBTI or Myers-Briggs Type Indicator®. Myers and her mother, Katharine Briggs, developed their model and inventory around the ideas and theories of psychologist Carl Jung, a contemporary of Sigmund Freud and a leading exponent of Gestalt personality theory.

Beginning in the early 1940's, Myers & Briggs extended Jung's model with the initial development of the MBTI. They put Jung's concepts into language that could be understood and used by the average person.

A MBTI Test would help a person to identify and choose four dichotomies which are preferred by an individual