I don't have data, I don't run a study. Are you saying that shame is an ineffective mechanism of social cohesion?
With my kids, I oversee everything they do (they are under 6). They average 15min daily for two episodes of a kids show.
I'm not saying go to zero. But definitely not over 3 hours and definitely not a dedicated device for them.
Oh, I was just trying to figure out how you were using shame to get other parents to change their behavior, since that's what you said worked. Wasn't looking for a study.