People who tested as "extroverts" on the personality test tended to have more friends, but their networks tended to be more sparse, meaning that they made friends with lots of different people who are less likely to know each other.
The researchers also found that people with long last names tended to be more neurotic, perhaps because "a lifetime of having one's long last name misspelled may lead to a person expressing more anxiety and quickness to anger," according to the study, which is being presented this week at the Computer Human Interaction conference in Vancouver.
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