Study cannot show that children exposed to more than two hours of screen time are more likely to exhibit ADHD symptoms. This one had self-reporting bias and did not have the power to show causality.

Health Headlines Commentary for April 18, 2019

Source:
Children who have more than two hours of screen time daily are more likely to display ADHD symptoms: study.

Reference:
Screen-time is associated with inattention problems in preschoolers: Results from the CHILD birth cohort study