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Although it is true that personalities are not dichotomies, the best (reproducible and meaningful) personality inventory to date is the big 5. Extraversion is o

Although it is true that personalities are not dichotomies, the best (reproducible and meaningful) personality inventory to date is the big 5. Extraversion is one of the inventories. https://en.wikipedia.org/wiki/Big_Five_personality_traits https://en.wikipedia.org/wiki/Big_Five_personality_traits Research has suggested that the brains of people identified with higher or lesser degrees of extraversion do function differently. You are correct that behavior does not derive deterministically from personality. Anecdotally, I agree that MTBI has been used as an excuse to refrain from developing beneficial social skills and behaviors.

runarberg 4y ago
> Research has suggested that the brains of people identified with higher or lesser degrees of extraversion do function differently. This is an extremely weak statement. You can find any difference in the brain if you look hard enough. The brain is an extremely dynamic system and our measurements are full of noise. And even you are able to fully account for the noise in measurements you can easily be measuring something different than you think you are. > You are correct that behavior does not derive deterministically from personality. This should be a failing grade of personality psychology. What is the point of measuring personality if you cant find any behavior associated with it? At this point personality psychology is nothing more than metaphysics and has no place in modern science.