A microgenetic research design with a multiple case study method and a combination of quantitative and qualitative analyses was used to investigate interdyad differences in real-time dynamics and developmental change processes in mother-infant face-to-face communication over the first 3 months of life. Weekly observations of 24 mother-infant dyads…

Warning others is a paradigm case of communicative helping and prospective action understanding. The current study addressed the ontogeny of warning in infants' gestural communication. We found that 12- and 18-month-olds ("n" = 84) spontaneously warned an adult by pointing out to her an aversive object hidden in her way…

When face processing studies find sex differences, male infants appear better at face recognition than female infants, whereas female adults appear better at face recognition than male adults. Both female infants and adults, however, discriminate emotional expressions better than males. To investigate if sex and age differences in facial scanning…

Objective: Maternal antenatal anxiety is associated with an increased risk of behavioral disturbances in offspring. Recent work has suggested that the effect of maternal antenatal anxiety on infant temperament at 6 months is moderated by the serotonin transporter polymorphism 5-HTTLPR, with carriers of the short allele more susceptible to the…

Although it remains a contentious issue, co-sleeping is becoming more popular in Western, industrialized societies. This article explores the practice of co-sleeping in crosscultural settings, examining the role of culture, the dominant Western discourse regarding sleep, and changes in policy recommendations regarding sleeping approaches. Although…

Research on object cognition in infancy suggests that children from (at latest) 1 year of age are capable of individuating objects according to property/kind information. It remains unclear from previous work, however, whether infants in such studies truly apply sortal (kind) concepts or whether they merely track objects on the basis of…

Purpose: The capacity of 6-month-old infants to discriminate a voicing contrast (/aba/--/apa/) on the basis of "amplitude modulation (AM) cues" and "frequency modulation (FM) cues" was evaluated. Method: Several vocoded speech conditions were designed to either degrade FM cues in 4 or 32 bands or degrade AM in 32 bands. Infants…

The present study investigated the effects of lexical age of acquisition (AoA), phonological complexity, age and expressive vocabulary on spoken word variability and accuracy in typically developing infants, aged 1;9-3;1. It was hypothesized that later-acquired words and those with more complex speech sounds would be produced more variably and…

Perceptual experiences in one modality are often dependent on activity from other sensory modalities. These cross-modal correspondences are also evident in language. Adults and toddlers spontaneously and consistently map particular words (e.g., "kiki") to particular shapes (e.g., angular shapes). However, the origins of these systematic mappings…

Group singing is a common feature of classroom-based music education, and has often been proposed to have benefits that extend beyond acquisition of music skills, primarily in academic achievement. However, potential social and emotional well-being benefits have been under-represented in these discussions. This article proposes that an…

Background: Whereas research has indicated that children with Down syndrome (DS) imitate demonstrated actions over short delays, it is presently unknown whether children with DS recall information over lengthy delays at levels comparable with typically developing (TD) children matched on developmental age. Method: In the present research, 10…

Gestures and vocal elements interact from the early stages of language development, but the role of this interaction in the language learning process is not yet completely understood. The aim of this study is to explore gestural accompaniment's influence on the acoustic properties of vocalizations in the transition to first words. Eleven Spanish…

Parents as partners in their children's learning is predicated by a notion of a mutual understanding of the learning as shared by educators. Documenting learning in early childhood education and care (ECE & C) settings has evolved from more traditional developmental approaches to include photographs, artefacts and social stories to make…

For more than 20 years, the MacArthur-Bates Communicative Development Inventory (CDI) and its adaptations for languages other than English have been used as reliable measures of infants' and toddlers' early receptive and productive vocabulary size. This article introduces the OZI, the Australian English adaptation of the MacArthur-Bates CDI, now…

Purpose: Identifying risk factors associated with neurodevelopmental disorders is an important line of research, as it will lead to earlier identification of children who could benefit from interventions that support optimal developmental outcomes. The primary goal of this review was to summarize research on risk factors associated with autism…