Choice and chance relative deprivation as determinants of cognitive dissonance.

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Abstract
While the limits of conditions that create dissonance may be greater than those stipulated by Festinger (see 32: 347), just where these limits lie is not yet known. An experiment was designed to reveal whether: (a) a chance event can affect the magnitude of dissonance, and (b) the effect of such a chance event depends upon there having been a prior choice in commitment to the event. (PsycINFO Database Record (c) 2006 APA, all rights reserved)