For years, the medical community has been concerned about the effects of digital devices and screen time on children and adolescents, especially with respect to physical activity and sleep. But some people have worried that these activities, including social media and TV watching, could harm kids’ mental health. Fortunately, a new study published in the journal Clinical Psychological Science offers good news. The researchers looked at depression, emotional problems, conduct problems, and suicidality. They found little evidence of an increased association between kids’ use of technology and mental health problems over the past 30 years.