同情崩溃效应是指随着求助者人数增加，施助者对求助者同情减弱的现象。本研究通过线上实验，选取北京地区被试70名（Mage = 22.00，SD = 1.77，男性22人）为研究对象，研究了求助者人数和求助者形象性对同情情绪的影响。以改编后的苏丹达尔富尔难民报道为背景材料，操纵求助人数（单人、多人）并测量被试感知的求助者形象性及同情情绪。结果显示求助人数显著负向预测求助者形象性及同情情绪，求助者形象性显著正向预测同情情绪。本研究验证了同情崩溃效应在中国被试群体内的存在，并发现求助者形象性在求助者人数与同情情绪间起到了显著的中介作用。研究结果对于理解同情崩溃机制和在现实生活中抑制同情崩溃效应具有重要意义。

The compassion collapse effect refers to the phenomenon that people's compassion becomes decreases with increase of the number of the victims. By carrying out online experiment, the influence of the number of the victim and the vividness of the victim on compassion was explored with the data of seventy college students in Beijing (Mage = 22.00, SD = 1.77, 22 males). Based on the reading material of refugee children’s lives in Darfur, Sudan, the experiment used two images with a different number of victim (single or eight victims) as manipulation of the independent variable. And the vividness perceived of the victim and compassion were measured by scales. Results showed that the number of the victim could negatively predict the vividness of the victim and compassion significantly, while the vividness of the victim could positively predict compassion significantly. The study proved the existence of compassion collapse effect in Chinese population and found that the vividness of the victim played a mediator role between the number of the victim and compassion. The result has great significance in understanding the mechanism of compassion collapse and preventing the effect of compassion collapse in real life.