The authors tested 2 mechanisms for the relation of movie smoking exposure with onset of cigarette smoking in adolescence. Longitudinal data with 8-month follow-up were obtained from a representative sample of 6,522 U.S. adolescents, ages 10-14 years. Structural modeling analysis based on initial nonsmokers, which controlled for 10 covariates associated with movie exposure, showed that viewing more smoking in movies was related to increases in positive expectancies about smoking and increases in affiliation with smoking peers, and these variables were both related to smoking onset. A direct effect of movie exposure on smoking onset was also noted. Mediation findings were replicated across cross-sectional and longitudinal analyses. Tests for gender differences indicated that girls showed larger effects of movie exposure for some variables. Implications for policy and prevention research are discussed.
Keywordssmoking; adolescents; movies; expectancies; peers It is known that there is an effect of movie exposure to smoking cues on smoking uptake by younger adolescents; that is, youth who view more occurrences of cigarette smoking in movies are more likely to smoke. An effect of movie exposure on adolescent smoking has been shown in cross-sectional research with several populations (Hanewinkel & Sargent, 2007;, and longitudinal studies have demonstrated that movie exposure precedes initiation of smoking Distefan, Pierce, & Gilpin, 2004;Jackson, Brown, & L'Engle, 2007). This topic is of public health significance because a substantial proportion of early initiators go on to become dependent smokers who have great difficulty in quitting (e.g., Correspondence Anthony, Warner, & Kessler, 1994;Breslau, Fenn, & Peterson, 1993). In view of the extensive exposure to smoking in movies (Sargent, Tanski, & Gibson, 2007) and the susceptibility of younger adolescents to media influences (Shadel, Niaura, & Abrams, 2002), it is important to understand how movies influence smoking during early adolescence.An effect of movie exposure on adolescent smoking has been demonstrated with control for important covariates, variables that are correlated with movie exposure and also are related to adolescent smoking Sargent et al., 2001). So, the basic effect is not readily attributable to confounding of movie exposure with these factors. However, theoretical questions about how this effect occurs need to be addressed. A question of particular interest to addiction research is whether environmental exposures operate through a direct effect, not involving any other processes, or whether they set in motion intermediate processes that are involved in smoking onset, that is, a mediated effect (MacKinnon, 2006;MacKinnon, Taborga, & Morgan-Lopez, 2002). On the basis of work suggesting that distal exposures may operate through indirect effects (Wills et al., 2001;Wills, Pierce, & Evans, 1996), we have proposed that movie exposure will have indirect effects on adolescent smoking. In the following sections, we discuss the theoretical ratio...