Personality Types

Carl Gustav Jung was a Swiss pschiatrist and psychotherapist who founded analytical psychology and lived from 1875 to 1961. He had many other interests, such as philosophy and literature, but he is best known for laying the ground work for what became the MBTI personality types.

Isabel Briggs Myers and her mother Katherine Cook Briggs were fascinated by Jung's personality theory and worked to make it easily accessible to others. They started the Myers & Briggs Foundation dedicated to just that.

Part of making this information available was not so it could be used as a weapon to control or manipulate others, but instead to better understand both yourself and those you deal with for a more productive and harmonious life.

Extraversion vs. Introversion

The source and direction of a person's energy and preferred environment.

  • Extroverts thrive on social contact and wither with prolonged isolation.
  • Introverts thrive in isolation and wither with prolonged social contact.
Sensing vs. Intuition

How information is perceived.

  • People who sense information rely on basic information as it is presented.
  • People who are intuitive rely on gut instinct and seek to interpret the meaning behind information presented.
Thinking vs. Feeling

How a person processes information to make decisions.

  • A thinking person evaluates data first through logic, reason, and consistency.
  • A feeling person evaluates data first through emotion, heart, and circumstances.
Judging vs. Perceiving

How a person uses information they have processed and structures their life.

  • Judgmental people stick to organization and plans, preferring finality.
  • Perceptive people stick to improvisation and alternatives, preferring change.

The four axes comprising of a person's personality merely explains the how of what they do, not the how or why. It does not measure their intelligence, morality, confidence, or abilities. For example, one type is just as capable of rescuing a stranger or committing murder as the next type. Individuals must still be judged and evaluated as individuals. Personality type is just one piece of the puzzle.

An Overview of the Sixteen Types
The cognitive functions of each type and a short personality description.
The Cognitive Functions
The eight cognitive types are based on the four functions of Feeling, Thinking, iNtuition, and Sensing, and associated attitudes of Extraversion and Introversion.
Population Percentages
How common and rare is each type.
These are various lists I've found scattered online. Most of them are silly and funny, some are thoughtful and insightful.
Take the Test
Take a simple test here on, or scroll further down to take the test at another site.
Recommended Links

Myers & Briggs Foundation
Cognitive Profile Learning Styles Model

16 Personalities
John's Personality Test
The Keirsey Four Temperaments
Personality Page
Type Logic