Examines the relationships among nonverbal behaviors, dimensions of source credibility, and speaker persuasiveness in a public speaking context. Finds numerous associations between nonverbal behaviors and attributions of credibility and persuasiveness. Discusses advantages of analyzing nonverbal cues according to proximal precepts. (SR)

Reviews the development of research on the persuasive effects of evidence, focusing on research dealing with the impact of evidence on persuasive communication. Concludes that evidence makes a difference in persuasive argument, and that the difference is affected by evidence type, along with relevant source, message, and receiver elements (191…

Reviews research concerning the role played by variations in the timing of communicator identification as one aspect of the effect that communicator credibility has on persuasive communication. Claims that variations in the timing of the identification of the source of a persuasive communication can produce substantial differences in persuasive…

Supports research indicating that disclaimers have no effect on perceptions of source credibility. Reveals that frequency of disclaimer use was unrelated to subject-juror evaluations of witness credibility and testimony believability; females did not use more disclaimers than males during examination; and when females used disclaimers, they were…

Presents a review and meta-analytic summary of existing studies of metaphor's persuasive effects. Indicates that metaphor appears to exert a small effect on perceptions of source dynamism, but shows no demonstrable impact on competence or character. Concludes that the superior organization explanation of metaphor's persuasive impact was most…

Discusses the probative potential of evidence in argument, and evaluates the importance of evidence in predicting belief change. Predicts adherence to argument claims and confirms the traditionally recognized importance of evidence to persuasion. (JMF)

Uses meta-analysis to test three models of the "sleeper" effect (a theory proposing that in the long term low credible sources may actually attain greater attitude change in message recipients than high credible sources). Concludes that the sleeper effect does exist, and offers suggestions for practitioners and theorists. (SR)

Examines cultural and personal values constraints on apologia through a case study of Governor Ray Blanton's apologia. Applies Bitzer's concept of functional communication and extends Jamieson's concept of the constraint of antecedent genre upon the rhetorical situation, examining of the impact of a speaker's antecedent rhetorical style upon later…

Indicated that (1) arguments perceived as strong by receivers generated both more favorable, supportive cognitive responses and attitude change than weak message arguments; and (2) perceived source expertise and attractiveness influenced cognitive responses, but not in a coherent fashion or to the extent that they effect attitude change. (JD)

Reports on three studies that investigated the relationship between message credibility and distortion in the context of a faculty unionization campaign. Concludes that comparisons of this election campaign with others will aid in understanding how people form impressions of sources and messages and select and employ campaign strategies and…

A study was conducted to test the hypothesis that for an "uninvolving topic" the persuasiveness of a highly credible communicator would be mediated by the favorability of the communicator-related thoughts generated, while for an "involving topic" the effect of the communicator's credibility would be mediated by the favorability…

Both rhetorical theorists and attitude change theorists agree that characteristics of the source of persuasive communication can improve the persuasiveness of that message. Writers from both perspectives have approached this notion from two divergent perspectives. Isocrates was concerned with the speaker's prior reputation, which is quite similar…

An important influence on a presidential candidate's debating style, the "incumbency factor," has been largely ignored by researchers. An analysis of the argumentative style of incumbents, based on the 1976 and 1980 presidential debates, has isolated three distinguishing characteristics: (1) presidential incumbents tend to avoid extended…

Tests a model of resistance to persuasion based upon variables not considered by earlier congruity and inoculation models. Supports the prediction that the kind of critical response set induced and the target of the criticism are mediators of resistance to persuasion. (JMF)

A study tested several different cognitive models of the way people use supporting arguments to arrive at belief in a claim. The models tested were (1) the model based on the assumption that human information processing is essentially logical; (2) R. S. Wyer's model; (3) the message-plus-context model; and (4) the weighted average model. One…