Home › Words › P › preexperimentpreexperimentpreexperiment · adj — before an experiment takes place.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom pre- + experiment.adjBefore an experiment takes place.nounA simple form of research that examines a group or groups before and after an event, to see whether there is change, but does not employ a control group.e.g.“A study that uses only a manipulation is considered a pre-experiment. As the name implies, a pre-experiment has not quite achieved the level of control necessary to be termed an experiment at all.” — 2016, Marina Krcmar, David R. Ewoldsen, Ascan Koerner, Communication Science Theory and Research:Definitions & examples from Wiktionary (CC BY-SA 3.0).