not only our beliefs that are open to question; also tentative and open to question are the findings of scientific studies. Because there are no foolproof ways to guarantee that evidence produced by scientific studies is purely objective, accurate, and generalizable, the scientific method also calls for the replication of studies. Replication means duplicating a study to see if the same evidence and conclusions are produced. It also refers to modified replications in which the procedures are changed in certain ways that improve on previous studies or determine if findings hold up with
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