They will has stressful feeling and it has a problem of learning for examples, you will thinking about the game only untill you will be not to pay attention in the class. Some people has a feel sleepy
Time matters because 8- to 18-year-olds who spend more time playing video games are more likely to perform more poorly in school, get into physical fights and/or be physically heavier. Gamers who were surveyed and classified as pathological were receiving lower grades in schools than their peers, were more likely to have video game systems in their bedrooms (65%), were spending much more time playing games each week (averaging 24.5 hours per week), and were also more likely to have been diagnosed with an attention deficit problem.