11--- 急， 谁能帮帮我把这个翻译成中文啊？
7. Static group comparisonsOne of the big problem is that most of cross-cultural comparisons are essentially "static group comparisons"---it is not possible to assign subjects randomly to different levels of a treatment variable.Malpass suggests that we should try to obtain data on as many rival explanations as possible, and then demonstrate that they are less plausible than the ideal one.
