The WSJ obtained access to an internal presentation on three years’ worth of research into the impact of Instagram use by teenagers, particularly teenage girls. The paper has not yet directly responded to that accusation, but has instead shared four more reports that Facebook did not make public … The social network also accuses the WSJ, which obtained copies of the reports, of “mischaracterizing” their conclusions. Facebook has attempted to defuse the controversy over its Instagram teen research by releasing two of the reports to the public, annotating them with what it says is important context.