What were the results of Festinger and Carlsmith's (1959) classic experiment involving a boring task?

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Festinger and Carlsmith's experiment demonstrated cognitive dissonance. Participants paid only $1 experienced more dissonance between the small reward and the lie they told about the task being interesting. To resolve this dissonance, they convinced themselves the task was more enjoyable, hence rating it as more interesting than those who received $20, for whom the larger reward justified the lie with less internal conflict.

What Were the Results of Festinger and Carlsmith's (1959) Classic