Abstract: Based on the survey data collected from 1669 college students representing 44 classes, the effects of class environments on internet altruistic behavior of undergraduates and its relationship with internet-behavior preference were tested. Hierarchical Linear Model (HLM) results revealed that: (1) Under the control of genders and internet experiences, internet-behaviors preferences of undergraduates could significantly predict the score of internet altruistic behavior. (2) Significant differences among classes existed in internet-games preference affecting internet-support and internet-sharing, computer-mediated communication preference affecting internet-support and internet-information preference affecting internet-reminding. (3)The girl rate and the average self-esteem in class could positively predict class mean difference of internet-support. (4) The average online time every week and the average self-esteem in class could significantly modulated the relationship between computer-mediated communication preference and internet-support.

Key words: internet altruistic behavior, internet-behavior preference, class environment, hierarchical linear model, college students.

摘要： 对44个班级的1669名大学生进行问卷调查，考察班级环境因素对大学生网络利他行为及其与网络行为偏好间关系的影响。多层线性分析结果表明：（1）在控制了性别和网龄之后，大学生网络行为偏好对其网络利他行为的得分有显著的正向预测效果；（2）游戏偏好对网络支持和网络分享的影响、交往偏好对网络支持的影响、信息偏好对网络提醒的影响均存在显著的班级差异；（3）班级女生率和班级平均自尊水平对网络支持的班级均值差异有显著的正向预测作用；（4）班级平均每周上网时间和班级平均自尊水平对交往偏好与网络支持间的关系具有显著的调节作用。

关键词: 网络利他行为, 网络行为偏好, 班级环境, 多层线性模型, 大学生。