An examination of two samples of National Merit Scholarship participants tested in 1962 and almost all participants (800,000) tested in 1965. Consistent effects in all three groups were observed with respect to both birth order and family size (firstborn and those of smaller families scored higher). (Author/SDH)

An investigation of size accuracy and spatial accuracy of depth perception in a total of 227 African, Chinese and European children between 4 and 10 years of age. The pattern of results varied little between cultures. (Author/SDH)

Assessed the speed with which children who were speakers of black nonstandard English responded appropriately to sentences presented in their dialect as compared to standard English. Also investigated two grammatical features that differ in standard and nonstandard dialect. Subjects were 96, 5- and 7-year-olds. (Author/SDH)

An investigation of the category-recall relationship using first, third, and fifth graders as subjects. Recall was found to be a function of the number of categories in the sort, and there were no differences in recall among the three retrieval conditions. (Author/SDH)

An exploration of age-related characteristics of children's personal categorizing schemes and relationships between free recall clustering (measured in reference to these schemes), and the number of items recalled. The 60 subjects were from five grade levels: 1, 4, 7, 10 and college. (Author/SDH)

Reports two experiments conducted in an attempt to extend findings by Ellis which suggest a rehearsal deficit in mentally retarded adults. (Author/SDH)

An investigation of whether attention to rewards in the delay contingency might facilitate delay if such reward-oriented attention was made instrumental. Subjects were 80 preschool children. (SDH)

Presents a study in which 128 children, from preschool to third grade, chose between an immediate reward and a larger, delayed reward. Imposed delay of response led to more choices to the delayed reward in second graders, but did not affect the choices of younger or older children. (Author/SDH)

An investigation of Hollanberg's contention that increased visual imagery is detrimental to concept acquisition. Subjects were 48 second grade children. (SDH)

An assessment of the occurrence of three forms of humor (responsive, productive, and hostile) during the activities of 30 nursery school children. The three humor forms were not significantly correlated. The relation of the ongoing activities and the pattern of humor exhibited, along with the significant sex differences in humor expression are…