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 110, with groups randomly assigned to the experimental conditions. Six individuals (three males and three females) representing three body types--endomorph, mesomorph, and ectomorph--each delivered a three-minute neutral message which was videotaped. One microphone was used, while cameras, placed side by side, took long, medium, and close-up shots. Subjects viewed these speeches and marked their responses on on-scan computer sheets. Results showed that ectomorphs were perceived as more attractive than endomorphs in all dimensions of interpersonal attraction and in dynamism, competence, and composure dimensions of source credibility. The overall implication of image size and body type interaction appears to be that shots which emphasize favored body types should be used. A list of references and thirteen tables of findings and post hoc analyses are included. (JM)