What they did was they got subjects to participate in a psychological experiment and the experiment consisted of asking the subjects questions that had quantitative answers, which were always numbers from zero to one hundred.

他们找了很多人作为实验对象,参加这个心理实验,在实验中会问这些人,需要量化回答的问题,答案范围是从0到100

耶鲁公开课 - 金融市场课程节选