Information about drugs is a basic component of any drug education program. This information must be perceived as credible and trustworthy by the target audience. Results of 16 studies indicate that friends, mass media, and professionals rank highly for most of the population as credible, trusted sources of information. (Author)

In order to examine the effects of manipulating image size (i.e., relative size) and body type of speakers in a television context on source credibility and interpersonal attraction, a study was conducted at Illinois State University during the spring of 1973. Subjects were eighteen intact groups of students enrolled in speech communication class…