It's a more powerful method than something called a cross-sectional study, and I'll come back in a later lecture and talk about these in more detail, but a cross-sectional study means you're taking a snapshot of a population of people at one time.

这种方法比所谓的横断面研究更加有效,我将在以后的课中,再仔细讨论这个问题,但横断面研究是指,你一次记录下一群人的状况

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

In one study by James Cutting, Cutting taught an Introduction to Psychology course and before each lecture he'd flash pictures on the screen.

在James，Cutting做的一个研究中，他教一门心理学导论课程,在每节课上课前，他会在屏幕上放一些图片。

耶鲁公开课 - 心理学导论课程节选