Right. Another way of saying it is there isn't random assignment of the subjects to the two conditions in the study.

换种方式说,受试者并不是随机安排在,这个研究中的两种情况下。

耶鲁公开课 - 心理学导论课程节选

So what we have to do, of course, is take it in to the lab and do this in a more systematic way with random assignment.

因此，我们必须做的是，把实验带回实验室,在随机安排下，更系统地做这个实验。

耶鲁公开课 - 心理学导论课程节选

That's no random assignment; it's not an experiment.

没有随机安排;,不满足实验的条件。

耶鲁公开课 - 心理学导论课程节选