The terms "introvert" and "extravert" (note the proper spelling with a rather than o) were originally introduced by Swiss psychiatrist C.G. Jung in his now classic text Psychological Types (1921).

The MBTI test helped spread the terms ‘introversion’ and ‘extroversion’ to a wider audience, but it’s widely seen as pseudoscientific.Photograph: H Armstrong Roberts/ClassicStock/Getty Images About 10 ...

The idea that people can be classified into types has a long history. Writing 23 centuries ago, the Greek philosopher Theophrastus sketched 30 characters that are instantly recognisable to this day.

photo: PhotoEuphoria, istock photography It’s not easy being an introvert in an extrovert world—especially when you're a kid. It is even more difficult if none of the adults in the kid’s life ...

What are you: an introvert or an extrovert? Russell Kane is a comedian, so he has always assumed he's a textbook loud-mouthed extrovert. But now he's not so sure. Across this series of interviews, ...

Introverts, as lawyer turned best-selling author Susan Cain explained in her 2012 book Quiet, are people who gain energy from being alone. In business, this means they often excel in roles that ...

While these Jungian systems of type testing can be interesting--formulating complex permutations of introversion, extraversion, feeling, thinking, sensation, intuition, judging and perceiving--as a ...

About 10 years ago, I took the Big Five personality test, known for being brutally honest. I had to laugh a little when I saw my scores: I ranked in the 91st percentile for neuroticism. When I shared ...