Agreed. This article doesn't address "how they work" - whether they "work" in the first place isn't at all clear, given how often they appear to either harm the

Agreed. This article doesn't address "how they work" - whether they "work" in the first place isn't at all clear, given how often they appear to either harm their users or simply do nothing - it's just elucidating "what they do" a little further. Two very different questions. No small task, of course, and the paper's pretty interesting, but it's not clear this has anything to do with what we call depression.