Most striking were their high scores for impulsive non-conformity and introverted personality traits, the researchers said.

Some of Zuckerberg's friends later speculated that it was also intended to help him deal with his own introverted personality.

The actors scored higher than the general group on three types - but did not display high levels of introverted personality traits.

Your nerves might be due to a wide range of things, from speech issues to rusty interview skills or an introverted personality.

The actors emerged as not having introverted personalities, but the comedians did.