Studies the effects of evidence in persuasive communication and suggests that the nature of the communication topic may be significantly related to evidence effectiveness and the attitude change process. (MH)

Examines the functional relationship of source and message by testing the hypothesis that the impact of a message is a function of the strength of the message multiplied by the strength of the source. (MH)

Investigates the effects of communication apprehension on listeners by focusing on the extent to which the apprehension of the sender influences his/her communication effectiveness as perceived by the receiver. (MH)

Investigates four directional hypotheses pertaining to the interactive effects of communicator and message type on attitude change and terminal perceptions of the communicator. (MH)

Contends that subjective or perceived homophily is more important than objective homophily in determining communication outcomes since it is communicator perceptions that influence communicator behavior. (MH)

Discusses a study designed to determine the amounts of attitude change experienced by apathetics under varying conditions of source credibility and quantity of information contained in a message. (MH)

Investigates the effects of various source characteristics on the persuasiveness of communications in the area of public health and presents evidence suggesting that a peer appeal can be more effective than a persuasive attempt by a source from a different age group. (MH)

Discusses a study based on the assumption that change of meaning is, under certain circumstances, of fundamental importance to the information integration process. (MH)

Discusses a study designed to investigate the relationships between vocal activity level and interpersonal attraction, perceived credibility, perceived homophily or interpersonal similarity and perceived power or ability to influence. (MH)

Studies the impact of children's verbal style, age, and sex, on social perception and concludes that the speaker with a dialect most similar to the listener will be perceived as the most credible. (MH)

Discusses a study designed to measure the effects of message threat level, message quality, and initial receiver attitude on attitude change and evaluations of source credibility. (MH)

This study tested two primary hypotheses concerning the effects of mispronunciation on the ratings of source credibility. First, as the number of mispronunciations presented by a speaker increases, audience ratings of source credibility will decrease. Second, the effects hypothesized in the first statement will be stronger for audiences at a more…