This paper aims to provide a systematic review of the literature on the associated factors with infant sleep-wake behaviour during the first 12 months of life, namely (1) the factors positively and negatively associated with sleep-wake behaviour and (2) the factors positively and negatively affected by sleep-wake behaviour. This systematic review…

This study investigates the importance of object function (action-object-outcome relations) on object individuation in infancy. Five experiments examined the ability of 9.5- and 12-month-old infants to individuate simple geometric objects in a manual search design. Experiments 1 through 4 (12-month-olds, N = 128) provided several combinations of…

Examines the relationship between an infant's sex and its capacity to maintain eye contact. Subjects were 15 male and 15 female newborn infants. (MP)

Investigates the effect of a recorded male human voice on neonate head, eye, mouth and crying behaviors. Vocal Stimulation enhanced head movement, eye opening, mouthing and crying and influenced hand sucking. Differences between breast fed and bottle fed babies were found for mouth orientation, hand sucking and crying. (RH)

Investigates the relationship between cardiovascular reactions and five basic emotions, (interest, anger, fear, distress, and joy) exhibited by 40 9- and 12-month-old infants. (CM)

Demonstrates that eye contact per se, and not solely the inherent attractiveness of the eyes and face, is salient to five-month-old infants. Five-month-old infants can distinguish when another person is looking at them, rather than at a nearby location. (Author/MP)

Discusses differences in results of factor analyses of ten diverse samples which have been studied using the Brazelton Neonatal Behavioral Assessment Scale (NBAS). Concludes that a single common factor structure accounts for the intercorrelations among NBAS items. (Author/BH)

Provides an overview of the development of the Brazelton Neonatal Behavioral Assessment Scale (NBAS), the nature of the instrument and conditions for its proper administration, and issues underlying the use of the NBAS in research (e.g., reliability). The first in a series of articles in a single monograph assessing the NBAS. (BH)

Reviews issues of reliability (especially test-retest reliability) in newborn assessment, discusses predictive models based on newborn assessment, and presents information on modifications of the Brazelton Neonatal Behavioral Assessment Scale which may help in pursuing fruitful questions involving prediction of development. (Author/BH)

Discusses the role and limitations of the Brazelton Neonatal Behavioral Assessment Scale in the continuing effort to construct an adequate account of infant development. (BH)

Describes the conceptual model of newborn organization underlying the Brazelton Neonatal Behavioral Assessment Scale (NBAS). Argues that while the NBAS allows for the identification of an individual's behavioral repertoire, attempts to synthesize the resulting data have been plagued with difficulties. Briefly outlines an alternative model for…

Utilizes experimental results to discuss the advantages and disadvantages of the Brazelton Neonatal Behavioral Assessment Scale as an instrument for measuring individual (rather than group) differences among infants and notes how these differences contribute to parent-infant interaction. (BH)

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…

Argues that using the Brazelton Neonatal Behavioral Assessment Scale outside the standard hospital setting introduces variations in the physical and social context that influence scores on some of the behavioral items. (Author/BH)