Do Random Assignments Really Work?

Most of the time people use random assignment. If you have large enough groups, then random assignment actually does work to even out into batl differences in your two groups. But there are some types of studies where they will match participants a in the two groups on one or two important dimensions. It's not as common as just using random assignment, though, right? Yes, a last last note before we get to results. This studi's methodology and analysis were pre registered. So doing this removes concerns that if researches report some significant difference, that it was just obtained through fishing or pea hacking. Theyv said, prior to da to collection, this is the analysis we want to