Summary (TL;DR)
The Myers-Briggs Type Indicator (MBTI) is a widely used but pseudoscientific personality test that categorizes people into 16 types based on four dichotomies. Developed by Katharine Cook Briggs and Isabel Briggs Myers during WWII, it lacks scientific validity and reliability. Studies show poor test-retest reliability, low predictive power, and no evidence for distinct dichotomies or type dynamics. The test is criticized for its vague Barnum effect descriptions and lack of independence in research. Despite this, it remains popular in business and education. In South Korea and China, MBTI has become a social trend, used for dating and hiring, though experts warn against such misuse. The publisher states the test is not meant for screening or life decisions.
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