Objective To investigate the prevalence of Internet Addiction(IA) for junior high school students,and to explore the influencing factors of IA.Methods A convenient sampling method was conducted to choose 1 183 junior high school students in Changsha city.By using Young's Diagnostic Questionnaire for Internet Addiction(YDQ),Barratt Impulsivity Scale(BIS-11),Internet Addiction Predict Test for Adolescents(IAPT),Achenbach's Child Behavior Checklists(CBCL) and Conners Inattention/Overactivity with Aggression(IO...