[mortehu]

I don't think it's introversion. I think it's the personality types that don't register or care how (negatively) people are reacting to them. For example, the guy that will talk to you incessantly about some topic you don't care about, or someone who's smelly because of their own fault.

[benjvi]

Yeah, fair point. My reasoning was that introverted people, being more introspective, will just have seen less reactions and so be generally less able to interpret them. But, this could be balanced by other traits - for example, greater stimulus sensitivity might mean introspective people place more importance on people's reactions to them