Correlational studies
Gentile and Anderson (2003) found that, in a survey of over 600 adolescents, time spent playing violent video games was associated with aggressive feelings, arguments with teachers and were more likely to get in a fight. Even children who are naturally calm and unlikely to get in a fight but spent more time playing violent video games, were more likely to get into physical fights than children who are more aggressive and hostile but played fewer violent games.
Longitudinal studies
Anderson et al. (2007) surveyed children at two points across the year. He found those who had high exposure to violent video games became more aggressive, both verbally and physically, and less prosocial. Anderson’s study suggests that repeated exposure to violent video games not only increases aggressive behaviour, but also decreases prosocial behaviour.
Evaluation – Longitudinal studies are the only studies that can really examine the long term effects of video games. However, this also means the participants will encounter a lot of confounding variables across the length of the study, for example different participants will be exposed to different levels of violence apart from video games; this lowers the validity of the study
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