Cell Phone Use on Playground Chart (IMAGE) University of Washington Caption Most north Seattle caregivers spent a small fraction of their playground time on a cell phone, and interactions were most often brief. Credit University of Washington Usage Restrictions With credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.