中文摘要：

个体使用互联网对其心理与行为的影响一直是研究者关注的焦点,同时互联网世界是丰富多彩的,不同的互联网服务对使用者的影响是不同的。该研究采用问卷法抽取北京市两所中学初一、初二年级学生进行调查,目的是考察初中生生活事件、即时通讯服务使用偏好与孤独感之间的关系。结果表明：生活事件带来的主观压力能够显著正向预测孤独感;即时通讯能够显著负向预测孤独感;客观压力不能够预测孤独感,但是它可以通过即时通讯间接地影响个体的孤独感水平。从结果中可以看到互联网的使用对个体的发展不全是消极的,即时通讯服务的使用能够缓解生活事件对个体产生的消极影响,对个体起到一定的保护作用。

英文摘要：

The impact of intemet use on individuals has been one of the loci of researchers, meanwhile the world of intemet is rich and colorful, so the influences of different internet services on internet users should differ from each other. In order to explore the relation among life events, Instant Messaging （IM） and loneliness for early adolescents, 322 students from two high schools were surveyed with questionnaires. The results indicated that subjective stress caused by life events could positively predict loneliness significantly; and that the preference for the use of IM could have a significantly negative effect on loneliness; objective stress caused by life events could not significantly predict loneliness, but it could indirectly predict loneliness through IM. According to the results, it is concluded that the influences of intemet use on users were not always negative, for IM could alleviate the negative impact of life events on internet users and thus acted as a buffer.