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)

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)

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)

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 people's conceptions of what believability should entail and how these conceptions differ over topic-situations. (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)