Solution:People receive hundreds of persuasive messages on a given day. Naturally, they discount a great majority of these messages by relying on cues such as the credibility of the message source. In general, it is expected that non-credible sources present invalid arguments.Therefore, communications associated with non-credible sources generally do not bring about substantial attitude change in response, and may be regarded as ineffective influence attempts.
Decades of research on the sleeper effect, however, suggests that it would be misleading to reach that conclusion without measuring attitudes down the line again.
People are not very good at remembering the original context of everything that they learn, and as a result, it is possible that they may continue to remember the message well but have a hard time remembering its source.
Thus, forgetting the non-credible source of the message or simply dissociating it from the message may bring about a delayed increase in persuasion.
This possibility, known as the sleeper effect, is counterintuitive because the impact of a persuasive message is usually greater at the time of exposure than some time after exposure.