Expectancy effects Expectancy e ect in the perceptual process is the extent to which
prior expectations bias perception of events, objects, and people. Expectancy e ects may also
bias perceptions even in less ambiguous situations. For example, your perceptions of a com-
mittee to which you have recently been assigned may be positive if your boss tells you that
the committee’s work is important and that it will be sta ed by talented people from several
departments. However, your perceptions may be negative if she tells you that the committee
exists solely for “political reasons” and contains some real dead woods ...
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