Do stage-related patterns of early cognitive development reported for normally developing children also characterize at-risk and handicapped children when mental age organization of data is used? Mental age predicted Piagetian-based cognitive levels one to three but did not predict highest-level symbolic functioning in 95 handicapped children.…

Assesses ability of infant tests to predict language and cognitive development and to detect infants at risk for developmental problems. The Bayley Mental Development Index was particularly capable of detecting infants at risk for developmental delay. The Caldwell Inventory of Home Stimulation identified home environment as a key factor in…

This study explored the relationship between the mother-infant interaction and the concurrent perceptual-cognitive and intellectual status of the infant. One hundred and eight-nine 12-week-old infants were given a battery of perceptual-cognitive tasks, including the Mental Developmental Index (MDI) of the Bayley Scales, the Corman-Escalona Scales…

This study was conducted to observe the effects of social class on the interaction of mothers and their 12-week-old infants. Data on the infants' cognitive and attentive behavior was also obtained. Each of 32 white and black infants from five different levels of social class was observed at home for two full hours of waking time. Observed infant…