Surprisingly, the Leadership/Authority, Superiority/Arrogance, and Sel
f-Absorption/Self-Admiration factors of the Narcissistic Personality I
nventory (NPI) can predict adjustment. In the present project, these a
pparently healthier forms of narcissism correlated directly with optim
ism and inversely with pessimism; and for more clearly pathological me
asures of narcissism like the NPI Exploitativeness/Entitlement factor
and the O'Brien (Psychological Reports, 61, 499-510, 1987) Multiphasic
Narcissism Inventory, these relationships were reversed. These data t
herefore revealed that the apparently more adaptive aspects of narciss
ism may be related to optimistic 'illusions' about the self which soci
al cognitivists have linked with mental health. They also suggested th
at narcissistic phenomena may be relevant to the claim that there is a
n 'optimal margin of illusion' beyond which problematic psychological
consequences may begin to appear.