[DriverDaily]

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).

[jncfhnb]

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.

[DriverDaily]

I was repsonding to this

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

Sounds like we agree this statement is false

[jncfhnb]

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…).