IQ & attitude:
1 SD below average: "Yeah I'm smart! What?"
Average: "I guess I'm OK?"
1 SD above average: "I'm not some kind of genius, but..."
2 SDs above average: "You know I'm a member of MENSA?"
3 SDs above average: "Gods help me, people are stupid."
4 SDs above: "I suck."
Conversation
For the record, I entirely buy that you need to be *really* smart to realize you're still almost as stupid as the worst idiot around.
1
4
(And this is about as serious as I'll ever get about IQ unless you ask me to put my geek glasses on, in which case...
... just don't, kay?)