Hal is not saying that video games definitely have no effect on children. What Hal wants is a study done by people that aren't trying to figure just how much video games are to blame for all of society's ills.
I absolutely agree that all forms of entertainment media need to be included in a truly comprehensive study. I also agree that any study done should be done by completely objective third parties, not shills for one side or the other.
I further believe that the results of such a study should then be examined by a separate set of neutral third party types to ensure that some form of bias did not find its way into the results through interpretation of said results or the methodologies used to gather them.
I, too, would be willing to get to work on this right after the grant check clears my bank.