The Myers-Briggs Type Indicator (MBTI) is the Jungian self-report questionnaire, authored by the Statesian mother-and-daughter team Katharine Briggs and Isabel Myers in 1944,¹⁾ and published through “The Myers-Briggs Company” (CPP, Inc.) since 1975.

Despite the instrument being widely regarded as faulty pseudoscience by psychologists,²⁾³⁾ it has remained in use by businesses, federal agencies, and universities⁴⁾⁵⁾⁶⁾ despite concerns being raised over possible biases and discrimination.⁷⁾ Furthermore, the instrument has seen a surge in popularity amongst East Asian countries, like China⁸⁾⁹⁾ and South Korea,¹⁰⁾¹¹⁾ to the point where it has become a dating tool.^12)13)14)

In short, the indicator uses four binary dichotomies to categorize people into sixteen personality types which use a four-letter initialism of said dichotomies as shown below.

• Extroversion (E) or Introversion (I)
  The “attitude” function, which assesses how you typically exert and gather energy.
• Sensing (S) or Intuition (N)
  The “information gathering” function, which assesses how you interpret new information.
• Thinking (T) or Feeling (F)
  The “decision making” function, which assessing what you do with that information.
• Judging (J) or Perceiving (P)
  The “lifestyle” function, which is more complex since it's mostly for further categorization.

Below is a grid of the sixteen personality types with the population percentages from the 2002 survey¹⁵⁾ and the most recent data at the time of this writing.¹⁶⁾ For fun, I've also listed the one-word descriptors used by 16Personalities (NERIS Analytics Limited), 16TEST (Aldra), equivalent Keirsey Temperament Sorter role, and equivalent formal name in Socionics.

The official methods of finding your personality type is either reading through the materials or completing a paid questionnaire at MBTI Online, but you can probably imagine that these options aren't really used. Instead, most people usually end up taking one of several MBTI-inspired tests online, listed below, that kinda dodges the copyright that surrounds the instrument.

• 16Personalities's NERIS Type Explorer (60 questions) - Most popular, but controversial within the MBTI community as it technically combines the MBTI with the Big Five.
• IDRLabs's Personality Type Test (44 questions)
• Keys2Cognition's Cognitive Processes Assessment (48 questions)
• Michael Caloz's Cognitive Functions Test (30 questions)
• Mistype Investigator's Cognitive Functions Test (80 questions)

• As usual, its use of the Barnum–Forer effect and confirmation bias should be noted.
• It's also important to note that personalities can change, despite what the official organization says,¹⁷⁾ so don't allow yourself to become a victim of labeling theory and pigeonhole yourself.
  • This can especially be harmful if you've ever looked into the ideal careers for each type, like, some of these personality types get paired with the worst careers and job choices.
• Despite being controversial within the MBTI community, there's actually fan art of the 16Personalities.
• For those curious, the curator used to fall under INTP–INTJ, but has since grown into an INFP.

• The Myers-Briggs Company - The official website for MBTI materials.
• Character Personality Diagnosis Thread Collection Wiki - Japanese-language resource and wiki that collects, as the name would suggest, fictional character personality diagnoses.
  • MBTI - Works by Syllabary or MBTI - Works by Genre
  • MBTI - Characters by Type (Protagonists, Last Bosses)
• Myers–Briggs Type Indicator on Wikipedia
• MBTI on Pixiv Encyclopedia [JA]
• MBTI on Niconico Encyclopedia [JA]
• Myers-Briggs Type Indicator and 16 Personalities on Namu Wiki [KO]
• MBTI on Moegirl Encyclopedia [ZH]