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3otal number adenoids analysis anthropometric attend nursery school attention until asleep breadth cent child chronological age compared control group control-group children CRITIQUE OF METHOD elimination Elizabeth McCormick Memorial evaluate factors fall and spring fall tests fourteen physical traits gain in mental group of children Habit Elimi Habit Present Fall habit status Habit Taken home observations included indicates instances Percentage Institute for Juvenile instruments of measurement intelligence quotients interval Juvenile Research McCormick Memorial Fund mean mental age mental growth Merrill-Palmer Scale Merrill-Palmer test mothers nated Gain nose-picking number of children number of instances Nursery-School and Control nursery-school children nursery-school experience nursery-school training parents period physical condition physical growth Preschool Department problem question Rating Value raw score reactions to adults regard reports retests school group sleep social histories social reactions spring tests standard deviation standard scores Stanford-Binet tests statistical Table Taken On Loss test results tion tonsils undesirable habits workers