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Gepubliceerd in: Journal of Youth and Adolescence 2/2012

01-02-2012 | Empirical Research

Efficacy of an Intervention to Reduce the Use of Media Violence and Aggression: An Experimental Evaluation with Adolescents in Germany

Auteurs: Ingrid Möller, Barbara Krahé, Robert Busching, Christina Krause

Gepubliceerd in: Journal of Youth and Adolescence | Uitgave 2/2012

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Abstract

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.
Voetnoten
1
Meta-analyses and prospective studies using criminal violence as an outcome variable have produced smaller effect sizes (e.g., Ferguson and Kilburn 2009; Ferguson, in press; Savage and Yancey 2008), but they are less pertinent to the present study that was concerned with addressing the effects of media violence on a broader range of aggressive behaviors in a general population sample of adolescents.
 
2
Because there is no agreement about calculating effect sizes in multilevel models (Raudenbush and Bryk 2002; Roberts and Monaco 2006), the Betas will be presented that also allow a comparison of the effects (Goldstein 2004; Rosenthal and DiMatteo 2001).
 
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Metagegevens
Titel
Efficacy of an Intervention to Reduce the Use of Media Violence and Aggression: An Experimental Evaluation with Adolescents in Germany
Auteurs
Ingrid Möller
Barbara Krahé
Robert Busching
Christina Krause
Publicatiedatum
01-02-2012
Uitgeverij
Springer US
Gepubliceerd in
Journal of Youth and Adolescence / Uitgave 2/2012
Print ISSN: 0047-2891
Elektronisch ISSN: 1573-6601
DOI
https://doi.org/10.1007/s10964-011-9654-6

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