Researchers at Darthmouth Medical School looked at middle-schoolers whose parents let them watch R-rated movies all the time. Almost a quarter of them had tried a drink behind their parents' backs.
Compared to kids whose parents never allow them to watch such movies, only three percent said they have had alcohol.
R-rated movies are intended for audiences 17 and older.
The study is in the Journal of Studies on Alcohol and Drugs.
