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1955 Approved by Adviser Department of Education ACKNOWLEDGMENT This study was made possible by the cooperation of many persons to whom X a m deeply Indebted. Appreciation is expressed first to my adviser, Dr. Hilda Rosebrook. Her valuable assistance and encouragement throughout the study are deeply appreciated. To the other members of my committee, Drs. Kenneth J. Arisnan., James B. Burr, Kerschel Nisonger, and Florence Robbins, the writer expresses sincere thanks. I am extremely grateful todoi:10.1080/00220671.1957.10882457 fatcat:zvyxrzfusnfhfpk7p3vj6qjwqq