Notes
* The studies reported herein were conducted with the assistance of the Work Projects Administration for the City of New York, Official Project 665-97-3-55, W.P. 1, Comprehensive Testing Program sponsored by the Board of Education, City of New York. The authors gratefully acknowledge the helpfulness and consideration shown by the principals and teachers in the schools included in the study and the aid rendered by the Advisory Committee on Evaluation of the Activity Program in the New York City Schools. The authors are pleased to acknowledge the splendid assistance of Mr. Alexander Wesman, Project Supervisor, and Dr. Philip Eisenberg, Project Technician, and the project workers under their supervision.