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An information-processing analysis is used in examining humor's effects on the attitude change process. Generally: humor integral to or adjacent to a persuasive message does not influence persuasion significantly; humor's effects on comprehension and source evaluations are inconsistent; and retention does not appear to be altered by humor usage. Severe methodological problems with prior research include inadequate control messages, questionable humor manipulations, inappropriate settings for receipt of humor, limited subject populations, and blatant demand characteristics. Many of these problems plague persuasion research in
Dorothy Markiewicz (Sun,) studied this question.