Thesis (Ph. D.)--Columbia University, 1930. / Vita. Published also as Teachers College, Columbia University, Contributions to education, no. 424. "This study is a continuation of the work of a joint committee ... for three years in charge of special opportunity classes for gifted children at Public School no. 165, Manhattan, New York City."--Introd. eContent provider-neutral record in process. Description based on print version record. "Books which gifted group reported having read": p. 97-101. "Bibliographical references": p. 113-117.