The Mysterious Dark Arts of the MBTI


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Last Updated: 18-09-2019 22:09


Even at its most fundamental expectation of measurement, namely counting, the MBTI is deficient. We simply cannot use it to measure anything because it is firstly, not uni-dimensional and secondly, not reliable. Not because we hate Katharine and Isabel, but because they unwittingly used a flawed theory. Good psychological models like the Big Five-based assessments and the Occupational Personality Questionnaire of SHL can generally be revisited using proper measurement development tools like Rasch analysis because they are fundamentally sound from a construct perspective. They have the fundamentals of proper psychological measures in place and are not constrained by a single psychologist’s perspective on personality.

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