The personality type theory that gives people codes based on their levels of four major traits, including sensing-intuition or thinking-feeling is called the Myers-Briggs.
The Myers–Briggs Type Indicator (MBTI) is an introspective self-report questionnaire designed to indicate psychological preferences in how people perceive the world and make decisions. The MBTI was constructed by Katharine Cook Briggs and her daughter Isabel Briggs Myers.
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