[koolkao]

interesting! that seems to be consistent with my experience. I can never work at my quiet office where just sitting down bores me to tears and puts me to sleep in less than an hour. working at a cafe on the other hand I can go on for hours.

Do you have more info on the introvert/extrovert link?

[anaphor]

I found this link which is basically what the prof said: http://www.bbc.co.uk/science/humanbody/mind/articles/persona... and an actual study: http://psycnet.apa.org/index.cfm?fa=search.displayRecord&UID...

Of course you should keep in mind potential confounding factors, but it's certainly interesting as an explanation. I'm not sure if there've been any studies where they took fMRIs while doing the lemon juice test, which would probably be a bit better.