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      Heuristic processing can bias systematic processing: Effects of source credibility, argument ambiguity, and task importance on attitude judgment.

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      Journal of Personality and Social Psychology
      American Psychological Association (APA)

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          Abstract

          High- and low-task-importance Ss read a strong or weak unambiguous message or an ambiguous message that was attributed to a high- or low-credibility source. Under low task importance, heuristic processing of the credibility cue was the sole determinant of Ss' attitudes, regardless of argument ambiguity or strength. When task importance was high and message content was unambiguous, systematic processing alone determined attitudes when this content contradicted the validity of the credibility heuristic; when message content did not contradict this heuristic, systematic and heuristic processing determined attitudes independently. Finally, when task importance was high and message content was ambiguous, heuristic and systematic processing again both influenced attitudes. Yet, source credibility affected persuasion partly through its impact on the valence of systematic processing, confirming that heuristic processing can bias systematic processing when evidence is ambiguous. Implications for persuasion and other social judgment phenomena are discussed.

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          Author and article information

          Journal
          Journal of Personality and Social Psychology
          Journal of Personality and Social Psychology
          American Psychological Association (APA)
          1939-1315
          0022-3514
          1994
          1994
          : 66
          : 3
          : 460-473
          Article
          10.1037/0022-3514.66.3.460
          8169760
          3edd2440-cfb7-4e42-bf70-5f594218016d
          © 1994
          History

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