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1 From the Institute of Child Welfare, The University of Minnesota. I wish to express grateful appreciation to Dr. Mary Shirley for guidance throughout the course of the study, and to Dr. John E. Anderson for many valuable suggestions. I also wish to thank the nursery school teachers and the graduate assistants for their cooperation, particularly Miss Marjorie Page who made the simultaneous observations. man (17), studying 27 pairs of girls and 29 pairs of boys in the seventh, eighth, and ninth grades found girl pairs more alike in scholarship, physical achievement, and extraversion, and boy pairs more alike in height, I.Q. and C.A. Furfey (7) obtained moderate correlations between C.A., developmental age, M.A. and weight for 35 pairs of friendly boys; but he concluded that non-intellectual factors
Euse Hart Green (Fri,) studied this question.