Good but bittersweet news for fans of The Americans. The hit FX drama series, which focuses on Russian spies living undercover as Americans in the 1980s, is currently in its fourth season, with three more episodes to go, and FX has renewed the critically acclaimed show for not one but two more seasons!
Experiments that take advantage of natural occurrences are quasi-experiments, for example, comparing achievement level of first-born children with that of later-born children; or comparing student performance at two schools, one of which has a lower student-teacher ratio.
A quasi-experiment is an empirical study used to estimate the causal impact of an intervention on its target population.uasi-experiments are also effective because they use the pre-post testing. This means that there are tests done before any data is collected to see if there are any person confounds or if any participants have certain tendencies.