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The delayed effectiveness of a persuasive message from a noncredible source.
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An impact of a study that does not appear immediately, but may manifest at a later time.
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A delayed increase in the persuasive impact of a noncredible source.
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Consumers forget the source of a message more quickly than they forget the message.
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The sleeper effect identified by psychologist Carl Hovland refers to the "hidden" effect of a propaganda message even when it comes from a discredible source.
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