Fox News Flash top headlines are here. Check out what's clicking on Foxnews.com. The average total daily screen use among adolescents more than doubled during the COVID-19 pandemic, according to a group of international researchers. In a study published Monday in the journal JAMA Pediatrics, the group found that screen use rose to 7.7 hours per day from pre-pandemic estimates of 3.8 hours per day. Using data from the Adolescent Brain Cognitive Development (ABCD) study and more than 5,400 adolescents predominantly aged 12 to 13 years, the authors determined screen use from adolescents' self-reported hours during a typical day from 2016 to May 2020.