Notes
1 Data employed in this study were collected in the course of the U. S. Office of Education, Cooperative Research Project No. 2021 (1963-65). The authors gratefully acknowledge the complete cooperation of the Cuyahoga Fall s (Ohio) public school system, fine coordinating work by Dr. Ruth B. Clayton of said system, and able assistance by Misses Barbara A. Frengel, Caroline T. Genovese, and Maria E. Chimbidis.