By Andrew M. Seaman NEW YORK (Reuters Health) – How parents monitor the television and video game habits of their children is tied to the kids’ performance in school, their relationships with peers and their weight, according to a new study. “It’s a fairly small effect, but what’s interesting about this study is because we tracked these children over time we see these effects build,” lead author Douglas Gentile told Reuters Health. He is a psychologist at Iowa State University in Ames. According to Gentile, the researchers can’t say children will gain one fewer pound or get in one fewer fight for every show parents approve for their kids.