There is stronger evidence that cell phone use is directly and negatively associated with spring GPA than is social networking, Hall said.
"In some of my own research, students who talk on their cell phones more to close friends report feeling entrapped by the always-on nature of their mobile device," Hall said.
"They get the good part -- feeling close to and well connected to friends, a priority for young women especially," he said. "But [they get] the bad part too -- feeling trapped and guilty and unable to switch off."
The American Academy of Child & Adolescent Psychiatry has tips for parents about social networking and kids.
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