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1218 - PSY3215 - exam 3 question three

Larry conducts an experiment with groups randomly assigned to one of three conditions: (1) writing about traumatic events, (2) writing about happy events, OR (3) writing about neutral events. Larry then measures the number of visits each participant makes to the health center over the next six months. Larry gives the participants a pretest regarding their health visits prior to the study so that he can create sets of participants who are equivalent on that variable. In this design, Larry has used _________ sets.