Research paints a complex picture of the role of technology in emotional states, and restricting teens' social-media use could cause harms of its own.Research paints a complex picture of the role of technology in emotional states, and restricting teens' social-media use could cause harms of its own.

Has Social Media Fuelled a Teen-Suicide Crisis?

Mental-health struggles have risen sharply among young Americans, and parents and lawmakers alike are scrutinizing life online for answers.