中文摘要：

通过对549名初一至高二年级城市青少年的问卷调查,考察了青少年病理性互联网使用的特点及其与疏离感之间的关系,并对家庭功能和同伴接纳是否可以调节疏离感与病理性互联网使用之间的关系进行了检验。结果发现：（1）在所有使用互联网的青少年被试中,网络成瘾群体的检出率为8.93%;（2）女青少年病理性互联网使用的突显性水平高于男青少年。在病理性互联网使用的消极后果上,初一青少年高于高一、初三和高二青少年。但青少年病理性互联网使用总体上不存在显著的性别和年级差异;（3）疏离感较高的青少年病理性互联网使用的水平也较高,健康的家庭功能可以保护疏离感高的青少年减少病理性互联网使用,但同伴接纳对高疏离感青少年减少病理性互联网使用不具有保护性作用。

英文摘要：

Internet as an important media has become an inevitable part of adolescents＇ lives.Although Internet meet various needs of adolescents,such as expressing emotions and seeking sense of belonging,misuse of Internet could result in psychological,social and academic problems during adolescence（Young Rodgers,1998;Davis,2001;Lei Yang,2007）.In this study,we use the term of pathological Internet use（PIU） to refer to the degree of adolescents＇ misuse of Internet and its negative outcomes.Alienation is a negative emotional state,reflecting individual incompetence in dealing with others and establishing an effective bond with social groups.Existing researches demonstrated that adolescents with high alienation were inclined to use Internet excessively.Researches on the relationship between pathological Internet use and adolescents＇ negative emotions reveal that positive factors of family and peer groups may be of important buffering effects（Thomas Schare,2000;Slater,2003;Gross,2004;Gao Chen,2006;Yeh et al.,2008）.Thus it is reasonable to assume that family functioning and peer acceptance could have a moderating effect on the relationship between adolescents＇ alienation and their pathological Internet use.The present study was to investigate the descriptive characteristics of adolescents＇ pathological Internet use and its relation to alienation,and to find whether or not healthy family functioning and peer acceptance could protect adolescents with high alienation from pathological Internet use.A total of 549 adolescents in the 7th（54 boys and 51 girls,Mage=12.84±0.48）,8th（54 boys and 51 girls,Mage=13.92±0.40）,9th（50 boys and 49 girls,Mage=15.06±0.50）,10th（81 boys and 43 girls,Mage=16.29±0.49） and 11th（62 boys and 54 girls,Mage=17.24± 0.43） grades of 5 high schools completed self-report questionnaires and Peer Nomination survey.The self-report questionnaires used in this study included Adolescent Pathological Internet Use Scale（APIUS）,General Alienation Scale and Family Assessm