ccording to a report released by the Pew Research Center last March, 37% of teens in the United States had smartphones in 2012 — up significantly from 23% in 2011. In addition, 95% of all teens use the Internet.
Dr. Lee reported that smartphone use in children and adolescents between the ages of 5 and 19 years in Korea increased dramatically from 7.5% in 2009 to 67% in 2012.
Dr. Jonghun Lee
"There are a wide range of smartphone functions, including Internet use, online gaming, digital cameras, and GPS [Global Positioning System] navigation. And you can use these functions anywhere and at any time. But these various convenient functions are contributing factors to excessive use," he said.