Children who spend more than 30 minutes on social media platforms like Facebook, Instagram and Snapchat are likely to experience a gradual decline in their ability to concentrate, according to a study of more than 8,000 children from around age 10 through age 14. 

Researchers at Karolinska Institutet in Sweden and Oregon Health & Science University in the US investigated a possible link between screen habits and symptoms related to Attention-Deficit/Hyperactivity Disorder (ADHD).