社会阶层与大学生网络利他行为:一个有调节的中介模型

采用问卷法对813名大学生进行调查，探讨社会阶层、公正世界信念、网络社会支持与大学生网络利他行为之间的关系及内在作用机制。结果发现：（1）客观社会阶层不能显著预测网络利他行为，主观社会阶层能正向预测网络利他行为；（2）公正世界信念在主观社会阶层与网络利他行为的关系中起部分中介作用；（3）网络社会支持调节了公正世界信念的中介作用。对于高网络社会支持个体，公正世界信念起部分中介作用；而对于低网络社会支持个体，公正世界信念的中介效应不显著，主观社会阶层对网络利他行为只有直接效应。

Social Class and College Students' Internet Altruistic Behavior: Moderated Mediating Effect

A questionnaire survey was conducted among a sample of 813 college students to explore the relationship among social class, belief in a just world, online social support and Internet altruistic behavior (IAB). The results indicated that: (1) Subjective social class could significantly predict IAB, while objective social class could not; (2) Belief in a just world acted as a mediator between the relationship of subjective social class and IAB; (3) The mediating effect of belief in a just world was moderated by online social support. That is to say, belief in a just world played a partial mediating effect between subjective social class and IAB for the individuals of high online social support; However, for the individuals of low online social support, the mediating effect of belief in a just world was not significant, the subjective social class only had direct effect on IAB.