Children who regularly use Facebook and other online social networks tend to perform less well in school than those who use them rarely, new research has shown.
A study of more than 12,000 15-year-olds found there was the equivalent of several grades difference between the reading, maths and science results of students who were heavy users of social media and those who were not.
However, pupils who went online to play video games, rather than to chat, tended to perform better in schools because the activity enabled them to "apply and sharpen" problem-solving skills used in the classroom.
The research by the Royal Melbourne Institute of Technology found that the maths performance of those who accessed social networks on a daily basis was 20 points lower than students who never went online to chat.
But the data, published in the International Journal of Communication, showed that the effect could be substantially reversed by online gaming, with daily players scoring 15 points above the average in maths and reading and 17 points above in science.