Or, as the researchers put it:
We propose that group members vary in their motivation to search for diagnostic information about whether other group members seek to cause them indirect harm. . . . We hypothesize that this motivation is associated with paranoid thought patterns and suspicion behaviors that can anger other group members and lead them to reject those who actively search for evidence that others are secretly trying to harm them.
Ugh. I hate studies like this. What are the paranoiacs supposed to do now? I can't help thinking that the ethical response to such results would have been to keep a lid on them, out of kindness to all the self-conscious neurotics out there who might otherwise amplify their misery by imagining conspiracies (and annoying co-workers) with renewed vigor.