Rates of anxiety and depression among teens in the U.S. have been rising for years. According to one study, nearly one in three adolescents (ages 13-18) now meets the criteria for an anxiety disorder, and in the latest results from the Centers for Disease Control and Prevention’s Youth Risk Behavior Survey, 32 percent of teens reported persistent feelings of sadness or hopelessness.

And there’s more bad news, grown-ups: The authors of two new parenting books believe you’re part of the problem.

“Kids are play-deprived nowadays,” says Katherine Reynolds Lewis, a journalist, parent, parent-educator and the author of one of those two new books, The Good News About Bad Behavior. And by “play” she means play without screens or adults keeping watch.