According to the self-categorization theory of group formation (Turner
, Hogg, Oakes, Reicher & Wetherell, 1987), a group comes into existenc
e when its members perceive themselves as belonging to a certain categ
ory. Based on this assumption, it is hypothesized that the extent of i
n-group attraction and in-group similarity should depend on the degree
to which the in-group is made salient. It was further predicted that
this effect of in-group salience should hold true only for highly iden
tified group members and not for persons who identify on a low level w
ith the group in question. In an experiment, students of psychology (N
= 126) evaluated an in-group member, i.e. a psychological counsellor,
on the basis of a tape-recorded therapeutic session and under differe
nt conditions of in-group salience. Either the in-group of psychologis
ts was mentioned, or the in-group was introduced in the context of rel
evant out-groups, or, in addition, a conflict between in-group and out
-groups was pointed out. The data support the hypothesis: that is, an
intergroup conflict increases in-group attraction and assumed similari
ty.