The Myers-Briggs Type Indicator (MBTI) assessment is a psychometric questionnaire designed to measure psychological preferences in how people perceive the world and make decisions. These preferences were extrapolated from the typological theories originated by Carl Gustav Jung, as published in his 1921 book Psychological Types (English edition, 1923). The original developers of the personality inventory were Katharine Cook Briggs and her daughter, Isabel Briggs Myers. They began creating the indicator during World War II, believing that a knowledge of personality preferences would help women who were entering the industrial workforce for the first time 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.

The purpose of the Myers-Briggs Type Indicator^® (MBTI) personality inventory is to make the theory of psychological types described by C. G. Jung understandable and useful in people’s lives. The essence of the theory is that much seemingly random variation in the behavior is actually quite orderly and consistent, being due to basic differences in the ways individuals prefer to use their perception and judgment.

Perception involves all the ways of becoming aware of things, people, happenings, or ideas. Judgment involves all the ways of coming to conclusions about what has been perceived. If people differ systematically in what they perceive and in how they reach conclusions, then it is only reasonable for them to differ correspondingly in their interests, reactions, values, motivations, and skills.

Myers Briggs Type Indicator, a personality test that measures four aspects of people's personalities:

1. Extroverted versus Introverted (E/I)

2. iNtuitive versus Sensing (N/S)

3. Thinking versus Feeling (T/F)

4. Perceiving versus Judging (P/J)

The identification of basic preferences of each of the four dichotomies specified or implicit in Jung’s theory.The identification and description of the 16 distinctive personality types thatresult from the interactions among the preferences.

Favorite world: Do you prefer to focus on the outer world or on your own inner world? This is called Extraversion (E) or Introversion (I).

Information: Do you prefer to focus on the basic information you take in or do you prefer to interpret and add meaning? This is called Sensing (S) or Intuition (N).

Decisions: When making decisions, do you prefer to first look at logic and consistency or first look at the people and special circumstances? This is called Thinking (T) or Feeling (F).

Structure: In dealing with the outside world, do you prefer to get things decided or do you prefer to stay open to new information and options? This is called Judging (J) or Perceiving (P).

Your Personality Type: When you decide on your preference in each category, you have your own personality type, which can be expressed as a code with four letters.

The 16 personality types of the Myers-Briggs Type Indicator® instrument are listed here as they are often shown in what is called a “type table.”

According to the MBTI, there are 16 different personality types, which are combinations on how people rank on each of these four characteristics. For example, if a person takes the MBTI and ranks as Introverted, Sensing, Thinking, and Perceiving, that person is an ISTP personality type.