Persons with PD showed a social-cognitive bias for perceiving hostility in ambiguous situations. The bias appears to be specific as it was not found in the psychiatric or nonpsychiatric control groups. Suggestions for future research are discussed.

Instead of an enhanced sensitivity for the recognition of emotional states, higher levels of paranoia were linked to a performance deficit on emotion perception tasks. The deficits in emotion perception may reflect the increased skepticism and scrutiny associated with posed emotion tasks (Davis & Gibson, 2000). Research should begin to focus on the underlying mechanisms of emotion perception deficits in paranoia.

We conclude that there is preliminary evidence for the presence of subtypes among nonclinical samples and discuss the patterns of performance in relation to previous research on subtypes of paranoia. The implications of these subtypes for the study of paranoia are discussed.

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