This test, also called the MBTI, was developed during World War II to categorize a person’s personality type. You take a formal questionnaire, which then lumps you into one of 16 personality groups.
Katharine Briggs, co-creator of the well-known Myers-Briggs Type Indicator (MBTI), once said that “every one of us is born either an extravert or an introvert, and remains extravert or introvert ...