The interactions of 10-month-old infants and their mothers were observed using mathematical models of interaction which state that the child's behavior depends on recent characteristics of mother's behavior, and that the mother's behavior depends on recent characteristics of the child's. Therefore, changes in the intensity of the behavior of one…

The effects of minor illness on infants' social behavior were studied among disadvantaged infants who attended a day-care program. Twelve infants aged 4 1/2 to 6 months were observed once while playing alone and once while interacting with their teachers each week for 6 weeks. A time-sampling procedure was used to record frequencies of…

This study was designed to test two alternate hypotheses regarding the meaning of increased lateral head movements in infants during experiments in which the mothers' voices were displaced from their faces. One interpretation is that the lateral looking responses of the infants are attributable to maturational effects on the infants' physiological…

The primary purpose of this study was to examine whether a general perceptual model developed by Vitz and Todd (1971), capable of dealing with multiple determinants of attending, is useful for understanding infant attending. The model, previously used in research with adults, assumes that perception can be represented as a stochastic sampling…

This study explores the development of visual self-recgonition by examining the effect of rouge application on the subsequent mirror behavior of 96 infants, ages 9-24 months. Each infant was observed in front of a mirror in four consecutive conditions: (1) with no rouge applied to infant's nose (baseline), (2) with a dot of rouge on infant's nose,…

This report is based on a longitudinal analysis of physical-contact interaction of mother-infant pairs throughout the first year of life. The sample consisted of 26 middle-class mother-infant pairs who were observed in their homes for four hours once every three weeks. During each visit, the observer made a running record of everything that…

This brief report suggests that it is evident that many uncertainties still remain with regard to neonatal narcotic dependence. Discussion centers on the precise causes and symptoms of neonatal narcotic dependence, the most efficacious treatment procedures, the relative severity of heroin dependence as compared with methadone dependence in the…

Studies of the infant's distribution of attention to stimuli of varying complexity, and of his differential attention to familiar versus novel stimuli (discrepancy), have attempted to shed light on the development of cognitive structures in the non-verbal infant. The subjects have typically been normal infants ages 4 to 6 months. For testing, the…

An autocorrelation technique was used to determine the periodicity underlying successive recurrences of specific sleep states (Quiet Sleep and Active Sleep). Groups of short (2-3 hour) polygraphic records and individual all night recordings were analyzed. Active Sleep and Quiet Sleep periodicities at 32 weeks conceptional age were 12 minutes. At…

The following are sketched in outline form: (1) functional antecedents and their implications for language--assimilation, accommodation, circular reactions/ feedback processes, classification, discrimination, functional equivalence, representation, transformation, communications; (2) semantic antecedents and their implications for language--human…

Vocalizations of two female infants, recorded over a five-week period after the first emergence of cooing were studied. It was found that the features of the more primitive sound types regrouped themselves in comfort sounds. The implications for theories of prespeech development are discussed. (EJS)

For availibility see EC 103 548 Among findings of a 2-year followup study of 43 infants of birth weight less than 1000 grams were the following: average height at age 2 years was between the tenth and twenty-fifth percentiles; average weight was between the third and tenth percentiles; 15 Ss developed lower respiratory tract infections during the…

Provides an update of information on infant nurturance and early learning of special interest to providers of services to parents and infants. (BR)

The cry sounds of 12 well-nourished and 12 malnourished male infants were compared using behavioral and acoustic measures. (BRT)