In an experiment, unacquainted male and female participants have a brief phone
conversation. Before the conversation, the male is shown a photograph of either
a very attractive woman or an unattractive woman, and told that he will be
conversing with the woman in the photograph. Later, a naive listener will hear a
recording of only the woman's side of the conversation and indicate whether he
thinks the woman is warm and likeable. Listeners tend to judge the woman as
"more warm and likeable" when the first man received an attractive picture. This
effects is known as a/an ____________.