Notes
1 This article contains the substance of a thesis submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the School of Education of New York University, 1940. The writer wishes to acknowledge the advice and assistance of Dr. Galen Jones and Miss Adria Galbraith of the Plainfield (New Jersey) High School, and of Professors Robert Hoppock, Paul V. West, and Ernest R. Wood of New York University.