Results of this study indicated that the frequency of an auditory stimulus is a dimension to which infants differentially respond in terms of response rate and acoustic characteristics of their vocalizations. (Authors)

Excerpts from a full report which appeared in the City Almanac, a publication of the Center of New York City Affairs of the New School for Social Research. (MB)

Author discusses the different contexts in which the concept of state is used, drawing on examples from her own research with newborns. (MB)

An analysis of the speech of infants gives a clue to the evolution of language. (DR)

Deals with biologically based sex differences in early childhood. Strategy is to assume that the earlier a particular behavioral difference appears in the life cycle, the more likely it is influenced by biological factors. Such biological influences may lead to differences in fear, cognitive functioning and variability between boys and girls.…

By including measurements of body length and head size along with birth weight, four distinct patterns of fetal growth impairment were identified. Diagnostic criteria presented make allowances for effects of race, sex, fetal age, and parity on each pattern. (Author/KW)

Studies show many experts believe that there is no significant difference between the age when a boy begins to communicate verbally and when a girl begins. (SW)

The article is addressed to nonmedical personnel working directly in the field of mental retardation. (CD)

Patterns of motor perceptual development in both black and white American infants are discussed, with implications for early childhood educators. (NH)