-Gathering data on the cross-section of the population and then trying to isolate the IVs and the DV at that one point in time
-Sacrificing internal validity (control over the experiment) for external validity
-It is very popular in the social sciences because it is very realistic
-Limitations: a form of nonexperimental design, no control group to compare it to, no pre-test, gathering data at one point in time means you don’t know if something has changed, no way to control the effects of history, a bad cross section means results are useless