Farther than stars said:
DrOswald said:
I think we're talking at cross purposes here. Of course you should disregard studies with faulty methodology, but the more independent studies are conducted, the less likely the chance becomes that all of them use a faulty methodology. Surely, all the issues you name are certainly valid, but personally I find them insignificant when faced with a multitude of other studies which indicate the same psychological effect by looking at it from different angles.
Of course you could nitpick every other study for their flaws, but the process would be futile considering the fact that there are no perfect or ultimate conclusions. And in my opinion, scientific consensus has been reached on this issue. Now all that rests is to continue testing it and adapting it to new theories and, luckily for us, we don't seem to be running out researchers willing to do that for us.
Ok, I am going to repeat this again. Having many studies does not make any of them valid. This isn't a roll of the dice sort of thing where you can expect every 1 out of 6 studies to be performed correctly. This is a crucial concept. You need to understand this. If you are going to perform a meta analysis you need to actually examine a large amount of studies and individually check each study for validity, throwing out bad data.
Second, there is no consensus on this issue. Just a few minutes on google brings up many studies with wildly varying results. Here are the findings of several studies, summarized and peer reviewed by Lillian Bensley, Ph.D., and Juliet Van Eenwyk, Ph.D., in their meta analysis of the issue.
"No effect of aggressive versus nonaggressive video games. Boys were more aggressive than girls before video game play and reduced aggression to a level similar to girls after play."
"No consistent findings"
"More aggressive behavior after violent video game."
"Video game play rated as moderately calming."
"No change in hostile mood after playing violent games. No associations of game preference with mood or psychoticism."
"Self-reports of hostile mood were higher after playing either video game than after no game. Difference between mildly and highly aggressive game was in predicted direction but not statistically significant."
"More aggressive behavior after playing or observing violent game and after watching violent cartoon than at baseline. No effect on fantasy behavior"
Their final conclusion: "In conclusion, current research evidence is not supportive of a major concern that violent video games lead to real-life violence. However, well controlled studies of adolescents are lacking. Also, this conclusion might change as more research is conducted on more recent and increasingly realistic games."
And from another, more recent meta analysis review by Christopher J. Ferguson, Ph.D., and John Kilburn, Ph.D.
"Publication bias was a problem for studies of aggressive behavior, and methodological problems such as the use of poor aggression measures inflated effect size. Once corrected for publication bias, studies of media violence effects provided little support for the hypothesis that media violence is associated with higher aggression."
And yet another conclusion from another similar meta analysis (Mark Griffiths, Nottingham Trent University, qualification not stated)
"To briefly conclude, the question of whether video games promote aggressiveness cannot be answered at present because the available literature is relatively sparse and conflicting."