Limiting social media use reduced loneliness and depression in new experiment

The idea that social media can be harmful to our mental and emotional well-being is not a new one, but little has been done by researchers to directly measure the effect; surveys and correlative studies are at best suggestive. A new experimental study out of Penn State, however, directly links more social media use to worse emotional states, and less use to better.
To be clear on the terminology here, a simple survey might ask people to self-report that using Instagrammakes them feel bad. A corr