Four of these eight preferences (E or I, S or N, T or F, J or P) make up a person's MBTI^® type, also called psychological or personality type. As you act on your type preferences, you create a unique approach to the world, to information, to decisions, and to other people.

The theory of psychological type says that people with different preferences naturally have different interests and views, behave differently, and are motivated by different things. Awareness of differences between types can help people understand and value other people who think and act quite differently.