It's notable that MBTI is fairly correlated with the FFM: https://psychology.stackexchange.com/questions/13460/what-co...

Few of those r-values are actually notable

> To further examine the universality of the Five-Factor Model, they examined how the MBTI dimensional raw scores related to the FFM/Big5 scores. They showed that FFM-Extroversion was highly correlated to MBTI-Introversion (r = -.74), FFM-Neuroticism was weakly correlated to MBTI-Introversion (r = .16), FFM-Openness was correlated to MBTI-Intuition (r = .72), and to MBTI-Perception (r = .30), FFM-Agreeableness was correlated to MBTI-Feeling (r = .44), FFM-Contentiousness correlated to MBTI-Perception (r = .49).

They’re not supposed to be the same thing. You would not expect them to have super high correlations Even if the tests were perfect.

I was repsonding to this

> It's notable that MBTI is fairly correlated with the FFM

Sounds like we agree this statement is false

Those are honestly pretty high correlations for something like this. High is subjective of course. I feel like the question you want to ask is how well can you predict an MBTI score knowing only someone’s FFM.

Well if a correlation value is .7 (squared to .49) then you would expect to guess correctly about 75% of the time with just the univariate relationship (naively assuming that the underlying distribution is 50/50 to begin with, without which we would need to refer to something like a RoC AUC score…).

Big 5 is accurate but hard to explain. MBTI is fairly easy to explain and honestly it's not like astrology where it is random, an INTP does act very differently than an ENFJ

The important difference is that psych frameworks are a description. And astrology is a predictor.

If you’re not a Taurus, the elements of a Taurus are not supposed to relate to you. that part of the framework is theoretically irrelevant.

If you think you’re an INTP you likely are. If you think you’re a Taurus then… doesn’t matter.

Each letter is binary, whereas personality is not.

If someone is barely extroverted you’re assigning them a full E anyways. That’s a poor predictor.