Media manipulation of adolescents' personal level judgements regarding consequences of smokeless tobacco use.

Videotapes were developed to try to impact on personal level judgements of concern and risk in the context of smokeless tobacco use, a growing substance use problem in adolescents. In a within-and-between-subjects design, convincingness (i.e., dramatic portrayal) of the videotaped message (high and low) and perceived probability of consequences portrayed in the message (high and low) were manipulated.