1 person , 13-20 years_old , Addiction , Adolescent , Bed , Bedroom , Boy , Computer , Computering , Dependence , Earphone , Game , Headphone , Headset , Indoor , Inside , Insomnia , Internet , Laptop computer , Leisure , Night , One person , Read , Reading , Recreation , Schoolboy , Sitting , Sleep , Sleep disorder , Sleeplessness , Social network , Teen , Teenage boy , Teenager , Video game , Web , Wi-Fi , Wifi , Wireless , Young