克里斯·塔斯基博士和福勒博士随机挑选了319名大学生，要求他们列出不多于三个朋友的名字，然后又用这些名字找到了另外425个朋友。
Dr Christakis and Dr Fowler selected a random group of 319 undergraduates and asked each to nominate up to three friends. Using these names, they collected another group of 425 friends.
他未出版的危地马拉研究一直尘封在匹兹堡大学的档案馆，直到最近才被医学历史学家里维尔比教授发现。里维尔比教授已经著有两部关于塔斯基斯研究的书。
His unpublished Guatemala work was unearthed recently in the archives of the University of Pittsburgh by Professor Reverby, a medical historian who has written two books about Tuskegee.
应用推荐