Online games can have negative social, health, and academic effects according to the document. Problems include sleep deprivation, lack of hygiene, decreased interpersonal relationships, increased obesity and eyestrain. Students may neglect schoolwork and classes to play games excessively. Over time, gamers can become addicted and replicate violent behaviors from games in real life. Psychological research also links gaming addiction to physical issues like carpal tunnel as well as social isolation. However, some studies show online games may also provide cognitive benefits and improve academic performance for some students.