Infant-directed speech (IDS) is characterized by a range of register-typical characteristics. Many of those can be objectively measured, such as acoustic-prosodic and structural-linguistic modifications. Perceived vocal affect, however, is a socio-emotional IDS characteristic and is subjectively assessed. Vocal affect goes beyond acoustic-prosodic…

Caregivers' sensitive responses to infant cry have long-term consequences for adaptive child development. Although mounting evidence suggests that parents who experience high emotionality to infant cry respond less sensitively to infant cry, there is a dearth of knowledge on potential mechanisms underlying individual differences in emotionality to…

Maternal gatekeeping is characterized by the extent to which mothers engage in behaviors that ultimately serve to inhibit (i.e., gate close) or encourage (i.e., gate open) father involvement in childrearing. This study considered direct and indirect associations between observed and reported maternal gatekeeping and children's social-emotional…

A developmental cascade model for adolescent substance use beginning in infancy was examined in a sample of children with alcoholic and nonalcoholic parents. The model examined the role of parents' alcohol diagnoses, depression and antisocial behavior in a cascading process of risk via 3 major hypothesized pathways: first, via parental…

Retrospective studies indicate 2 major classes of autism spectrum disorder (ASD) onset: early and later, after a period of relatively healthy development. This prospective, longitudinal study examined social, language, and motor trajectories in 235 children with and without a sibling with autism, ages 6-36 months. Children were grouped as: ASD…

From a dynamic systems perspective, transition points in development are times of increased instability, during which behavioral patterns are susceptible to temporary decoupling. This study investigated the impact of the vocabulary spurt on existing patterns of communicative coordination. Eighteen typically developing infants were videotaped at…

Responses to traumatic stress during the earliest years of life can change quickly and can be difficult to identify because of the young child's rapid rate of development. The symptoms of traumatic stress will depend on the child's developmental level and individual coping styles, as well as the quality and nature of the child's most important…

Behne, Carpenter, Call, and Tomasello (2005) showed that 9- to 18-month-olds, but not 6-month-olds, differentiated between people who were unwilling and unable to share toys. As the outcome of the two tasks is the same (i.e., the toy is not shared), the infants must respond to the different goals of the actor. However, visual habituation paradigms…

This study examined the developmental course of infants' attentional preferences for 3 types of infant-directed affective intent, which have been shown to be commonly used at particular ages in the first year of life. Specifically, Kitamura and Burnham (2003) found mothers' tone of voice in infant-directed speech is most comforting between birth…

The second of a four-part series on the development of infants and toddlers, this article reviews current research on social and emotional development during the first two years and provides a selected list of activities designed to promote infants' optimal development. Attachment behavior and affective behavior are two major topics explored. (EV)

Presents a developmental study of changes in infant attachment behaviors. Five groups of female infants, 8, 11, 14, 19, and 24 months of age, were observed during varying types of separation experiences. Changes in proximity behaviors and contact behaviors were analyzed. (BD)

From a developmental-structuralist perspective, describes stages of child development; presents operational criteria to help the clinician categorize infants and young children whose behavioral and emotional patterns may fall outside the expectable, normal range; and illustrates the diagnostic approach with five case studies. (RH)

The report reviews assessment guidelines developed for visually impaired infants (birth-24 months). Project staff examined research on the assessment of infants with vision loss and identified material relevant to their needs. Following a review of existing assessment tools, guidelines were prepared in the following areas: social competence,…

Distributed by the U.S. Departments of Agriculture, Education, and Health and Human Services, this pamphlet provides parents with information and advice about their infants in the fourth month of life. Following a brief description of developmental characteristics at this age, the pamphlet offers information on topics including feeding, early…

Distributed by the U.S. Departments of Agriculture, Education, and Health and Human Services, this Spanish-language pamphlet provides parents with information and advice about their infants in the fourth month of life. Following a brief description of developmental characteristics at this age, the pamphlet offers information on topics including…