I certainly would like to learn more on this. It's easy to beat up on Facebook these days, for many good reasons, but who knows if the WSJ got everything right or not. As a Facebook advertiser myself since the alpha in 2008, I can tell you it is very easy to measure direct response, but measure mood, self esteem, correlation/causation is really really hard. One could hypothesize that its not that Insta makes kids sad, but that sad kids hang out more on Insta. Certainly the happy teens I know who are dedicated to some sport or club, are on social media less, but thats not why they are happy, they are happy because they have found their mission and people offline.

I also know that of the kids I personally know who have been gone down some dark pathway or been radicalized, it's been all about YouTube, and not sure why the online commentary is like 100:1 Facebook to YouTube.

They also said: "This research, some of which relied on input from only 40 teens, was designed to inform internal conversations about teens’ most negative perceptions of Instagram. It did not measure causal relationships between Instagram and real-world issues. "