Should MBTI be included at all, given its psychometric problems?

The case for

MBTI is widely legible. For many readers it is the first archetypal vocabulary they meet, and the eight cognitive functions it surfaces remain useful even when type-stability is weak. Removing it would cut off a major on-ramp.

The case against

Test-retest reliability is weaker than the system implies; corporate use has been repeatedly criticised; the theoretical grounding in Jung's Psychological Types is thinner than Myers and Briggs claimed. Presenting it at parity with Jungian or Enneagram frameworks risks endorsing pseudoscience.

• — Pittenger (1993) on MBTI reliability
• — Stromberg & Caswell on corporate MBTI

Devil's advocate

Retaining MBTI 'for accessibility' is the same move the PMAI wheel makes with Pearson — a theoretical framework commercially laundered past the criticism that should have reshaped it.