[zwieback]

I just finished "The personality brokers", fantastic book, which explores how E<>I entered popular culture via the Myers-Briggs test.

When the E<>I spectrum was subjected to more rigorous analysis it turned out it may just be a metric of "talkativeness" and not really related to the Jungian concept.

[bootsz]

Hmm.. Talkativeness seems way too narrow to me. The theory of deriving energy externally vs. internally makes the most sense to me personally. Though it would certainly correlate with talkativeness. But I'm not an expert on the matter :)

[thanatropism]

Yeah but then you have to define energy.

[Jach]

Extraversion has had proper studies with the Big 5 traits, it's more than just "talkativeness". But some of the seeming conflicts come from the 5 traits being able to be factored further into 10 aspects; for extraversion it splits between "enthusiasm" and "assertiveness". See e.g. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4818974/ or http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.513...