NO.PZ201511190100000306
问题如下：
Which one of the following biases did Jordan not demonstrate?
选项：
A.Self-attribution.
B.Representativeness.
C.Illusion of knowledge.
解释：
B is correct.
Nowhere in the scenario did it mention that Jordan classified certain information into a personalized category. Representativeness bias is a cognitive bias in which people tend to classify new information based on past experiences and classifications. Jordan is not relating the certainty about the future or her decision to hold losing positions back to something she has done or experienced in the past.
一方面，通过representativeness bias与conservatism bias的辨析来学习，可以理解较透彻，Base-rate neglect and sample-size neglect也能理解地很好。对于此题而言，如果representativeness bias是对新信息overreact，那么文中主人公对价格反转的坚信，就算表现了什么，也应该是conservatism bias。
另一方面，教材对representativeness bias的定义又看得很难受，people tend to classify new information based on past experiences and classifications，一下子搞得文中主人公的行为似乎也符合这种定义。
所以，真的是对representiveness bias很晕
