The primary purpose of this study was to examine uneven early development in premature infants. A multiple regression analysis was performed in which birth weight, length of gestation, length of assisted feeding, and length of ventilation were used to predict the descrepancy between a child's Psychomotor and Mental Scale scores on the Bayley…

This paper describes a multivariate model of early infant competence formulated from variables representing infant-environment transaction including: birthweight, habituation index, personality ratings of infant social orientation and task orientation, ratings of maternal responsiveness to infant distress and social signals, and observational…

This paper explores the effects on school achievement of the following variables: (1) intelligence; (2) social class; (3) early motor and language development; (4) preschool experience; (5) gender; and (6) composition of household. The subjects were 65 children of 9 to 11 years, in grades four to six, in Puerto Rican public schools. They were…