Efficacy of an Intervention to Reduce the Use of Media Violence and Aggression: An Experimental Evaluation with Adolescents in Germany
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Several longitudinal studies and meta-analytic reviews have demonstrated that exposure to violent media is linked to aggression over time. However, evidence on effective interventions to reduce the use of violent media and promote critical viewing skills is limited. The current study examined the efficacy of an intervention designed to reduce the use of media violence and aggression in adolescence, covering a total period of about 12 months. A sample of 683 7th and 8th graders in Germany (50.1% girls) were assigned to two conditions: a 5-week intervention and a no-intervention control group. Measures of exposure to media violence and aggressive behavior were obtained about 3 months prior to the intervention (T1) and about 7 months post-intervention (T2). The intervention group showed a significantly larger decrease in the use of violent media from T1 to T2 than the control group. Participants in the intervention group also scored significantly lower on self-reported aggressive behavior (physical aggression and relational aggression) at T2 than those in the control group, but the effect was limited to those with high levels of initial aggression. This effect was mediated by an intervention-induced decrease in the normative acceptance of aggression. No gender differences in program efficacy were found. The results show that a 5-week school-based intervention can produce changes in the use of media violence, aggressive norms, and behaviors sustained over several months.
KeywordsMedia violence Intervention Experimental evaluation Longitudinal study
The research reported in this paper was supported by a grant from the German Research Foundation (Kr 972/9-1). The authors gratefully acknowledge the support of Anja Berger, Juliane Felber, Patricia Baumert, Mareike Büttner, Inken Hukemann, Pascal Jacob, Julia Kleinwächter, Songül Schira, Grzegorz Szarowski, and Jessica Wenzlaff.
- Anderson, C. A., Berkowitz, L., Donnerstein, E., Huesmann, L. R., Johnson, J. D., Linz, D., et al. (2003). The influence of media violence on youth. Psychological Science in the Public Interest, 4, 81–110.Google Scholar
- Bandura, A. (1977). Social learning theory. Englewood Cliffs: Prentice Hall.Google Scholar
- Christensen, P. N., & Wood, W. (2007). Effects of media violence on viewers’ aggression in unconstrained social interaction. In R. W. Preiss, B. M. Gayle, N. Burrell, M. Allen, & J. Bryant (Eds.), Mass media effects research: Advances through meta-analysis (pp. 145–168). Mahwah, NJ: Lawrence Erlbaum.Google Scholar
- Coyne, S. M., Nelson, D. A., Lawton, F., Haslam, S., Rooney, L., Titterington, L., Trainor, H., Remnant, J., & Ogunlaja, L. (2008). The effects of viewing physical and relational aggression in the media: Evidence for a cross-over effect. Journal of Experimental Social Psychology, 44, 1551–1554.CrossRefGoogle Scholar
- Goldstein, H. (2004). Some observations on the definition and estimation of effect sizes. In I. Schagen & K. Elliot (Eds.), But what does it mean? The use of effect sizes in educational research. Slough: NFER.Google Scholar
- Huesmann, L. R. (1998). The role of information processing and cognitive schema in the acquisition and maintenance of habitual aggressive behavior. In R. G. Geen & E. Donnerstein (Eds.), Human aggression: Theories, research and implications for social policy (pp. 73–109). San Diego, CA: Academic Press.Google Scholar
- Huesmann, R. L., & Kirwil, L. (2007). Why observing violence increases the risk of violent behavior by the observer. In D. J. Flannery, A. T. Vazsonyi, & I. Waldman (Eds.), The Cambridge handbook of violent behavior and aggression (pp. 545–570). Cambridge: Cambridge University Press.Google Scholar
- Kirsh, S. J. (2006). Children, adolescents, and media violence. Thousand Oaks, CA: Sage.Google Scholar
- Kirsh, S. J. (2010). Media and youth: A developmental perspective. Oxford: Wiley.Google Scholar
- Krahé, B., Möller, I., Huesmann, L. R., Kirwil, L., Felber, J., & Berger, A. (2011). Desensitization to media violence: Links with habitual media violence exposure, aggressive cognitions and aggressive behavior. Journal of Personality and Social Psychology.Google Scholar
- MacKinnon, D. P. (2008). Introduction to statistical mediation analysis. New York: Lawrence Erlbaum Associates.Google Scholar
- Muthén, B. O. (1998–2004). Mplus technical appendices. Los Angeles, CA: Muthén & Muthén. Retrieved 30 September 2009 from: http://statmodel.com/download/techappen.pdf.
- Muthén, L. K., & Muthén, B. O. (2011). Mplus user’s guide. Statistical analysis with latent variables. Los Angeles, CA: Muthén & Muthén.Google Scholar
- Muthén, B. O., & Satorra, A. (1995). Complex sample data in structural equation modeling. In P. V. Marsden (Ed.), Sociological methodology (pp. 267–316). Washington, D.C.: The American Sociological Association.Google Scholar
- National Television Violence Study. (1997). Vol. 1. Thousand Oaks, CA: Sage.Google Scholar
- Potter, W. J., & Byrne, S. (2007). What are media literacy effects? In S. R. Mazzarella (Ed.), 20 Questions about youth and the media (pp. 197–208). New York: Peter Lang.Google Scholar
- Rasbash, J., Charlton, C., Browne, W. J., Healy, M., & Cameron, B. (2010). MLwiN Version 2.22. Bristol: Centre for Multilevel Modelling.Google Scholar
- Raudenbush, S. W., & Bryk, A. S. (2002). Hierarchical linear models: Applications and data analysis methods. Thousand Oaks, CA: Sage.Google Scholar
- Rehbein, F., Kleimann, M., & Mößle, T. (2009). Computerspielabhängigkeit im Kindes- und Jugendalter. KFN-Forschungsbericht No 108. Hannover: Kriminologisches Forschungsinstitut Niedersachsen e.V. Retrieved 16 December 2010 from: http://www.kfn.de/versions/kfn/assets/fb108.pdf.
- Roberts, J. K., & Monaco, J. P. (2006). Effect size measures for the two-level linear multilevel model. Paper presented at the Annual meeting of the American Educational Research Association.Google Scholar
- Rosenthal, R. R. (1990). Media violence, antisocial behavior, and the social consequences of small effects. In R. Surette (Ed.), The media and criminal justice policy: Recent research and social effects (pp. 53–61). Springfield, IL: C. C. Thomas.Google Scholar
- Sherry, J. L. (2001). The effects of violent video games on aggression. A meta-analysis. Human Communication Research, 27, 409–431.Google Scholar
- Sparks, G. G., & Sparks, C. W. (2002). Effects of media violence. In J. Bryant & D. Zillmann (Eds.), Media effects: Advances in theory and research (2nd ed., pp. 269–285). Mahwah, NJ: Lawrence Erlbaum.Google Scholar
- Zelli, A., Dodge, K. A., Lochman, J. E., & Laird, R. D. (1999). The distinction between beliefs legitimizing aggression and deviant processing of social cues: Testing measurement validity and the hypothesis that biased processing mediates the effects of beliefs on aggression. Journal of Personality and Social Psychology, 77, 150–166.PubMedCrossRefGoogle Scholar