MBTI, or the Myers-Briggs Type Indicator, is probably the most popular personality test. It contains four axes: Introverted/Extraverted, iNtuitive/Sensing, Thinking/Feeling, Judging/Perceiving. If you take the test, you may be assigned one of 16 personality types, for instance I would be INTJ.
The MBTI is regarded as pseudoscience, perpetuated by the popular consciousness and HR departments rather than academic research. One time I asked a personality psychologist and she said it was just so far off from reality that nobody even bothered talking about it. Psychologists prefer to talk about another personality model, called the Five Factor Model, also known as The Big Five. This has five axes, labeled Openness, Conscientiousness, Extraversion, Agreeableness, and Neuroticism (OCEAN).
I’ve often remarked that although the Five Factor Model is supposedly more scientific, it’s clearly a lot less compelling. And isn’t that something? I couldn’t honestly say that I find astrology compelling, or ear candles compelling, but the MBTI, now that’s some yummy pseudoscience. I have some remarks on what makes MBTI a pseudoscience, what makes it compelling, and what its problems are.