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 to

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... . Robert J. Wherry for his time in advising m e on statistical problems and I am especially indebted to Mr* Leroy W o X i n s for the statistical analysis of my data. T h e writer also extends sincere thanks to Drs. Sidney Pressey, Viola Cassidy, and Harold Phelps for their help in structuring the pur poses a n d design of the study. T o each school that cooperated so willingly in this study, the author i s very much indebted. Without such cooperation the study would not h a v e been possible. T o his wife, the writer extends his deepest love and appreciation for h e r continuous inspiration and encouragement.