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Effect Size in Media Violence, Research and Effects of

  • By: John L. Sherry
  • In: Encyclopedia of Media Violence
  • Edited by: Matthew S. Eastin
  • Subject:Mass Communication, Aggression & Violence, Violence & Society

Effect size refers to the strength of a research finding. In the media violence research, effect size is most frequently used to determine the magnitude of the relationship between use of violent media and aggression. There are a number of different statistics that describe effect size, as well as a number of techniques for determining and pooling effect sizes across studies. Done well, an effect size estimate provides a reliable summary of the relationship between variables across a number of studies. For this reason, it is often invoked in discussions of the violent media literature.

What Is an Effect Size?

Effect sizes are the estimate of the magnitude of the relationship between variables. Many statistics reported in the research literature are estimates of effect size, including zero ...

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