The impact of differences in maternal self-efficacy and infant difficulty on mothers' sensitivity to small changes in the fundamental frequency of an audiotaped infant's cry was explored in 2 experiments. The experiments share in common experimental manipulations of infant difficulty, a laboratory derived measure of maternal efficacy (low,…

This study was aimed at sorting out conflicting results in the literature concerning 2-month-olds' sensitivity to interpersonal contingency, and investigated the potential role of infants' positive emotion in contingency detection. Infants were randomly assigned to an experimental group (EG) that was presented an uninterrupted live-replay-live…

This study was designed to assess genetic influence on behavioral inhibition and its varying expression in 92 monozygotic and 86 dizygotic twin pairs. Infant behavior and mother-child interaction were observed and videotaped during structured play sessions at age 14, 20, 24, and 36 months. Analysis of the results suggests that most of the overlap…

Study investigated whether the observed individual differences in visual pursuit endure beyond the neonatal period. (Authors/MB)

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)

Suggests future directions for study of sensitivity and its impact on early psychosocial development: (1) renewed attention to growth of attachment in context of other developing features of the parent-child relationship; (2) factors that moderate impact of sensitivity on developing security; (3) origins of individual differences in sensitivity;…

Advocates renewed efforts toward assessing attachment on a single continuum of emotional security. Contends that theory is essential to guide attachment assessment and that the constructs of secure base and emotional security provide the needed conceptual foundation. Addresses challenges to the scoring of attachment on a security continuum.…

Examined maternal and infant behaviors, behavioral coordination, maternal response, and nonresponse in relation to security of attachment. Subjects were 40 Euro-American mothers and 39 Central American immigrant mothers studied when their infants were 4-, 8-, and 12-months-old. Found that individual differences on measures of maternal response and…

Concerning the issues of emotional development, general agreement can only be reached on the definition of "emotional" behavior. Behavior is emotional when it varies from an individual's behavioral baseline by the addition of three components: (1) an action component, (2) an arousal component, and (3) a subjective "feeling" component. In all areas…

Used time-lapse video to record sleep/wake states of preterm infants for three 24-hour periods at 33 and 35 weeks conceptional age. Found that very-low-birthweight preterm infants showed marked stability and developmental change in the organization of sleep/wake states from a very early age, and their states were related to demographic variables…

Highlights usefulness of the categorical approach to measuring infant attachment by reviewing some major advances in the field that have been fostered by that approach. Advances include identification of the disorganized attachment group, development of the concept of conditional behavior strategies, creation of systems for coding attachment…

Ainsworth's system of classifying attachment patterns will not be easily displaced primarily because of difficulties involved in a dimensional approach. Problems include the number of dimensions involved, need to develop reliable scales, and need to describe how behavior changes across age and in the Strange Situation. Only when an alternative…

This study examined (1) the level of symbolic capability as revealed in play, (2) the use of spontaneous vocal imitation, and (3) the nature of certain classes of words occurring in spontaneous infant language. Facets of child behavior were examined during the period of single-word utterances and early multiword combinations with a view to…

Reviews research on, and offers definitions for, play and learning in infancy. Discusses the developmental sequence in early exploratory play and learning, individual differences in exploratory play, and the relationship between rearing environments and quality of exploratory play. Discusses implications for planning and implementing infant care…