The ''ba, ba, ba'' sound universal to babies' babbling around 7 months captures scientific attention because it provides insights into the mechanisms underlying language acquisition and vestiges of its evolutionary origins. Yet the prevailing mystery is what is the biological basis of babbling, with one hypothesis being that it is a non-linguistic…

Background: The present study was designed to investigate the association between visual exploratory behaviour in early infancy, novelty seeking in adolescence, and the dopamine D4 receptor (DRD4) genotype. Methods: Visual attention was measured in 232 three-month-old infants (114 males, 118 females) from a prospective longitudinal study using a…

Patterns of mothering and fathering in 72 families were observed longitudinally and from the perspective of the family system when infants were 1, 3, and 9 months old. Findings suggested similarities and differences in mothering and fathering. (Author/RH)

From a developmental perspective, examines the emotions and behaviors elicited by different types of infant cries. Participating were 60 children ranging in age from late preschool to preadolescence. (Author/RH)

Reviews literature on children up to age one to determine whether heart rate (HR) is a reliable, stable, and valid measure. Considers factors influencing resting HR and the Law of Initial Values, discusses information about response to stimulation and infant perception and affect obtained by using HR measures, and describes HR use in risk…

Effects of mothers' contingent and non-contingent vocal stimulation on vocalization and looking behavior was investigated in 10 Down's Syndrome infants. Neither condition increased infant vocalization but results suggest that looking behavior may be an important indication of competence in pre-linguistic social communication for developmentally…

The behavioral development of rural Guatemalan infants was assessed shortly after birth on a Neonatal Assessment Scale (NAS) and at 6-, 15-, and 24-months-of-age on a Composite Infant Scale (CIS). Summary variables based on NAS performance poorly predicted later assessed performance even as recently as six months after birth. The CIS modestly…

Older Down's syndrome infants responded to the regular reappearance of a squeaky doll with significantly more affective behavior than did younger Down's syndrome infants. Longitudinal research with the younger infants indicated that the onset of affective behavior significantly correlated with mental development and aspects of temperament.…

Describes the Brazelton Neonatal Behavioral Assessment Scale, which is used to assess infants' competence in organizing their states of consciousness, interactive capacities, physiological responses, and environmental responsiveness. Various projects which have used the scale are reported. The predictive value and clinical uses of the scale are…

In two experiments, infants 9-17 months of age were probed for recognition of a previously unfamiliar trained name. Responses were videotaped and scored for gaze, gesture, and vocalization. Results demonstrate improvement in receptive language capacity over the age range studied. (RMH)

In follow-up studies conducted 36 hours, 3 months, and 12 months after delivery, maternal behavior, infant behavior, the duration of breast feeding, and attitudes toward child rearing procedures were shown to develop differently among mothers and infants receiving physical contact soon after birth as compared to control subjects who were briefly…

Explored infants' responses to live and replay interactions with mothers and their own images. Found that to their mothers, infants decreased attention, length of first gazes, and smiling from initial live feedback to replay, and that responses to subsequent live feedback generally remained suppressed. Also found that infants did not show a…

Examined whether the characteristics in perception of speech sounds found in preverbal hearing infants might extend to the perception of signed language in infants with congenital deafness. Seventeen Japanese mother-infant dyads participated in the study. Found that infants with deafness showed greater attentional and affective responsiveness to…

Examined contributions of cognitive processing speed, short-term memory capacity, and attention to infant visual recognition memory. Found that infants who showed better attention and faster processing had better recognition memory. Contributions of attention and processing speed were independent of one another and similar at all ages studied--5,…

Assessed association between aspects of mother's employment and security of infant-mother attachment. Found that mothers' prenatal attitudes toward work and timing of work return made significant contributions to attachment outcomes apart from effects of maternal sensitivity, demographic, maternal, child, and child care factors. Mothers who…