Points out that teachers frequently emit nonverbal messages that contradict their verbal messages. Isolates vocal cues (special characteristics of the communicator's voice) as the nonverbal behavior for study. Examines the interaction of vocal cues and verbal messages with respect to impact on teacher credibility. (PD)

Examines whether communication apprehension mediates the effect of nonverbal involvement cues (head nods, eye contact, body orientation, etc.) on state anxiety, interpersonal attraction, and speech duration in information gathering interviews. Finds that nonverbal cues affect loquacity and liking, but that a speaker's communication apprehension…

Examines fourteen representative nonverbal behavior studies and identifies three significant conceptual problems. Proposes a new framework for nonverbal behavior theory development. (MH)