What do we call people who only care about their own grades?

我们把这种人叫什么呢

耶鲁公开课 - 博弈论课程节选

So rational choice in this case, people not choosing a dominated strategy; people choosing a dominant rational choice can lead to outcomes that - what do Americans call this?--that "Suck."

理性的选择,即本案例中人们不去选择劣势策略,反而选择优势策略,使总结果变得,美国人怎么说的,"糟糕"

耶鲁公开课 - 博弈论课程节选