[_98fj]

> If you put them in an empty room, you could instead easily picture the introvert being calm and the extrovert tense due to a lack of human interaction.

That is what I said. I guess my usage of the word "tension" is different.

> Being alone is then a way of reducing sensory input to produce a sense of calm, it's not that an introvert would need to be alone to relieve any inner tension.

Producing a sense of calm IS the work of relieving inner tensions. I think here lies our misunderstanding.

When I'm talking about inner "tension", I'm not talking about any form of visible or invisible stress. Just that there is something "going on". Thought, ideas, inner monologue, some kind of inner activity.

There are people who regularly experience prolonged periods without thoughts, idea, inner monologues etc. They are routinely able to access a state of mind which could be described as happily relaxed nothingness.