MBTI® Overview

About the MBTI

The Myers-Briggs Type Indicator® instrument measures personality preference on four scales; Extraversion - Introversion (E - I), Sensing - Intuition (S - N), Thinking - Feeling (T - F), and Judgment - Perception (J - P). The theory and scales are briefly described.

Isabel Myers

A biographical sketch of the creator of the Myers-Briggs Type Indicator® instrument, the most widely used personality assessment in the world today.

Type Descriptions

Personality preferences reported through the MBTI tool result in 16 different personality types, one of which should fit you. Read brief profiles on all 16 types.

Type Dynamics

Psychological Type is not static. There is interplay between the different preferred functions of the 16 types, resulting in different strengths for each.

Reliability and Validity

An explanation of these basic statistical concepts and why it is important in the field of psychological tests.

Test Comparison

The MBTI instrument is about healthy personality. It does not measure, diagnose, or address mental health issues.

Ethical Use

There is a code of ethics for the appropriate use of psychological type. For example, type should not be used as a basis for workplace hiring decisions.


Answers to 13 commonly asked questions about psychological type.

Related Organizations

There are a number of organizations throughout the world that provide training, products and services related to the MBTI instrument.