Card 13 / 26: Festinger and Carlsmith conducted an empirical test of cognitive dissonance theory. After establishing a negative attitude to a boring experiment, they induced their participants to perform a counter-attitudinal behaviour voluntarily. For this purpose, the participants were offered a large amount of reward ($20) or a small amount of reward ($1). Which of the following is TRUE about this experiment?
A) Cognitive dissonance should not occur in either condition.
B) Cognitive dissonance should be greater in the $20 condition than in the $1 condition.
C) A greater attitude change was observed in the $1 condition than in the $20 condition.
D) An attitude change occurred when the participants performed the counter-attitudinal behaviour involuntarily.

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