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.
Quasi-Experimental Designs ï§In a quasi-experimental design, the researcher lacks control over the assignment to conditions and/or does not manipulate the causal variable of interest. ï§A quasi-independent variable is not manipulated by the researcher but rather is an event that occurred for other reasons.ne-group pretest-posttest design ï§For these reasons, simple pretest-posttest design should never be used without a control condition and other efforts to control third variables. Time 1 Measure Treatment Time 2 Measure O1 X O2.