A study has linked Facebook users with worse exam results than their non-social networking friends.Researchers at Ohio State University found students who enjoy communicating via cyberspace spend less time studying and risk getting a whole grade lower than their peers as a result despite more than three quarters of Facebook users claiming their interaction with friends on the site didn’t interfere with their work.The study claims Facebook users averaged one to five hours a week studying, while non-users studied 11 to 15 hours per week.The researchers surveyed 219 students at Ohio State University, including 102 undergraduate students and 117 graduate students. Of the participants, 148 said they had a Facebook account.Students who spent more time working at paid jobs were less likely to use Facebook, while students who were more involved in extracurricular activities at school were more likely to use Facebook.Aryn Karpinski, co-author of the study and a doctoral student in education at Ohio State University, said: “We can't say that use of Facebook leads to lower grades and less studying – but we did find a relationship there."There's a disconnect between students' claim that Facebook use doesn't impact their studies, and our finding showing they had lower grades and spent less time studying."