I would have liked to have seen a third group studied, that cut down on 30 minutes of social media by replacing it with another activity. The goal would be to b

I would have liked to have seen a third group studied, that cut down on 30 minutes of social media by replacing it with another activity. The goal would be to better isolate the effects of the time saving from the effects of the reduced exposure. (Please understand I’m interested in the study design, not dismissing the finding, which has plenty of support from other studies.) (I recognize the challenge of finding the time-spending equivalent of a placebo, too. It seems worth trying.)