The function and maintenance of illusions were explored. Three groups
were selected by comparing perceived risk for contracting an STD or be
coming pregnant with reported sexual behaviors: realistic low risk (n
= 33), realistic high risk (n = 23), and illusional low risk (n = 16).
Illusional subjects tended to avoid exposure to risk information, den
y its relevance, and experience no increase in negative affect when co
nfronted with contraceptive information. In contrast, high-risk subjec
ts expressed interest in viewing contraceptive information, acknowledg
ed its relevance and, among women, experienced an increase in negative
affect after viewing the information. Avoidance and denial were ego-p
rotective, primarily for illusional subjects. Implications for researc
h on the self-regulatory effects of illusional beliefs are discussed.