Analyzed reactions 15 boys and 19 girls received from adults and peers when subjects attempted to communicate and physically assert control. At 14 months, children's behavior did not differ by sex, but caregivers differentiated responses by sex; at 24 months, children's behavior differed by sex, but caregivers did not differentiate their responses…

Using the Ainsworth Strange Situation Procedure, a study examined the interrelations between dimensions of emotion and social interactive behaviors to explore the regulatory role of each in mother-infant interaction and how these roles may change in the second year. (HOD)

Studied the sleep state organization and EEG patterns at term date in 53 preterm infants as an index of the maturity and integrity of neurophysiological organization that may have implications for their later development. (HOD)

The Carolina Record of Infant Behavior was used to assess the stability from 3 months to 1 year of such characteristics as activity level, irritability, and social responsiveness in 39 preterm infants at risk for developmental disorders. The most stability was observed on such developmentally based items as social orientation. (Author/JW)

Study of children aged 21 to 31 months tentatively concludes: (1)behavioral tendency to be inhibited or uninhibited with unfamiliar people or during unfamiliar events is moderately stable across time and context; and (2)moderately negative relationship exists between behavioral inhibition and heart rate variability, and positive relationship…

Combinatorial abilities in language and elicited symbolic play were compared in a longitudinal study of 30 children at 20 and 28 months. In addition, multivariate analyses were used to assess the stability of individual differences. Generally, different symbolic play variables contributed unique explained variance to different language variables.…

Twenty-five infants were tested every two weeks on the AB Object Permanence Task, from the time they first reached for a hidden object until they were 12 months old. Results indicate that the AB provides an index of the ability to carry out an intention based on stored information despite a conflicting habitual tendency. (Author/RH)

Incidence of self-scratching injuries were examined in 300 newborns divided into subject groups based on birth weight, gestational age, Apgar score, mode of delivery, and the presence or absence of delivery complications. Injuries were attributed to normal neonatal movements; degree of injuries may reflect the maturity and physical activity of the…

The benefits of infant intervention programs depend on their appropriateness to the characteristics of the baby, the environment, and the transactions between them. For healthy, normal infants, intervention will be superfluous at best. A basic prerequisite for designing any intervention program is an understanding of the fundamental importance of…

Contending that developmental disability is defined by cognitive and affective performance as well as hazardous biological events, the authors consider multiple factors as cumulative in placing an infant at risk for future developmental disability. A risk scoring system based on biological and behavioral factors in an additive manner is presented.…

This study examined the development of imitation under naturalistic conditions. Participating were 320 parents, who provided diary records of imitation by their 12-, 15-, and 18-month-old infants over a 7-day period. Approximately half of the infants were first-borns and half had older siblings. The findings indicated that infants of all ages…

The most impressive class difference in one-year-old infants revealed by this study was that lower-class infants vocalized considerably less in the playroom than did middle-class infants. (Authors)

Discussion focuses on the development of experimental techniques which have revealed a competent infant, one who is both sensitive to his external environment and capable of modifying and being modified by that environment. (Author)