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Area of Science:

  • Psychology
  • Communication Studies
  • Linguistics

Background:

  • Previous research explored high and low elaboration thinking processes for vocal confidence signals influencing attitude change.
  • Vocal confidence signals like fast speech, falling intonation, and low pitch have been studied for their persuasive effects.

Purpose of the Study:

  • To investigate the role of vocal confidence, specifically falling intonation, in persuasion under moderate elaboration levels.
  • To determine the circumstances under which falling intonation benefits persuasion.
  • To examine how vocal confidence influences message processing and thought-attitude correspondence.

Main Methods:

  • Three experiments were conducted to test the effects of vocal intonation on persuasion.
  • Participants were exposed to messages with varying vocal intonation patterns (falling vs. rising).
  • Elaboration levels were manipulated to simulate moderate processing conditions.

Main Results:

  • Falling vocal intonation, compared to rising intonation, signaled speaker confidence.
  • Under moderate elaboration, falling intonation increased message processing.
  • Falling intonation bolstered the persuasive impact of strong messages over weak ones, increasing message-relevant thoughts and thought-attitude correspondence.

Conclusions:

  • Falling intonation can enhance persuasion, but only under specific conditions, particularly moderate elaboration.
  • Vocal confidence signals play a nuanced role in guiding persuasion by influencing message processing.
  • This study uncovers novel mechanisms through which vocal cues impact persuasion and attitude change.