中文摘要：

为探讨压力事件对初中生抑郁的影响以及网络使用动机和网络使用强度在其中的作用,采用生活事件量表,网络使用动机量表,网络使用强度量表和流调中心用抑郁量表对武汉市内两所中学的913名初中生进行调查。结果发现：（1）压力事件与网络使用动机、网络使用强度和抑郁均呈显著正相关;（2）压力事件正向预测网络使用动机与网络使用强度,网络使用动机正向预测网络使用强度,网络使用强度正向预测抑郁;（3）网络使用动机中,社会补偿动机正向预测抑郁,而好友联系动机与休闲娱乐动机负向预测抑郁;（4）压力事件通过网络使用动机和网络使用强度的链式中介作用影响抑郁。研究结果强调压力事件不仅可以直接影响初中生抑郁,还可以通过网络使用动机和网络使用强度间接影响初中生抑郁。

英文摘要：

In order to investigate the relationship between stressful events and depression, as well as the role of motives for internet use and internet use intensity in this relation, a sample of 913 junior high school students were recruited to complete Life Events Scale, Motives for Internet Use Questionnaire, Internet Use Intensity Scale and Center for Epidemiological Studies Depression Scale. Results revealed that： （ 1 ） stressful events were positively associated with motives for internet use, internet use intensity and depression; （2） stressful events positively predicted motives for internet use and internet use intensity, and motives for internet use positively predicted internet use intensity, and internet use intensity also positively predicted depression; （3） among motives for internet use, social compensation motive was positively associated with depression, whereas entertainment and peer group contact motives were negatively associated with depression; （4） stressful events predicted depression through the serial mediation of motives for internet use and internet use intensity. Results highlighted that stressful events could not only directly affect junior high school students＇ depression, but could indirectly affect junior high school students＇ depression through motives for internet use and internet use intensity as well.