We investigated 16- and 20-month-olds' flexibility in mapping phonotactically illegal words to objects. Using an associative word-learning task, infants were presented with a training phase that either highlighted or did not highlight the referential status of a novel label. Infants were then habituated to two novel objects, each paired with a…

Mutual exclusivity (ME) refers to the assumption that there are one-to-one relations between linguistic forms and their meanings. It is used as a word-learning strategy whereby children tend to map novel labels to unfamiliar rather than familiar referents. Previous research has indicated a relation between ME and vocabulary development, which…

Fragile X syndrome (FXS) is the most common known genetic cause of autism spectrum disorder (ASD). Although 50-75% of children with FXS meet ASD criteria, no studies have compared ASD symptoms in infants with FXS versus other high risk groups, such as siblings of children with ASD (ASIBs). Using the Autism Observation Scale for Infants, our…

One of the first challenges facing the young language learner is the task of segmenting words from a natural language speech stream, without prior knowledge of how these words sound. Studies with younger children find that children find it easier to segment words from fluent speech when the words are presented in infant-directed speech, i.e., the…

The science is unequivocal in showing that infants and toddlers begin learning very young, and the workforce must be equipped with the specific skills and practices to fully support this important period of development. A major conclusion in the 2015 report from the Institute of Medicine and the National Research Council, "Transforming the…

Humans are born with the ability to mentally represent the approximate numerosity of a set of objects, but little is known about the brain systems that sub-serve this ability early in life and their relation to the brain systems underlying symbolic number and mathematics later in development. Here we investigate processing of numerical magnitudes…

Recent studies with infants and adults demonstrate a facilitative role of labels in object categorization. A common interpretation is that labels highlight commonalities between objects. However, direct evidence for such a mechanism is lacking. Using a novel object category with spatially separate features that are either of low or high…

This study tested whether maternal responsiveness may buffer the child to the effects of maternal depressive symptoms on DNA methylation of "NR3C1," "11ß-HSD2," and neuroendocrine functioning. DNA was derived from buccal epithelial cells and prestress cortisol was obtained from the saliva of 128 infants. Mothers with depressive…

In the domain of "Counting & Cardinality," Common Core State Standards indicate that by the time students leave kindergarten, they should know the names and sequence of number words up to 100, be able to count to determine the number of objects in a small set (up to 20), and make comparisons between small sets of objects (National…

Relations between maternal sensitivity and physiological reactivity to infant crying were examined using measures of heart rate (HR) and respiratory sinus arrhythmia (RSA) in 49 mothers of second-born infants. Using the Ainsworth Sensitivity Scale, an independent assessment of maternal sensitivity was made during maternal free play and bathing of…

This MSHS Services Snapshot summarizes key data on demographics and services for children from birth to age five and pregnant women served by all Migrant and Seasonal Head Start programs. The data in this Snapshot is a subset of the annual Program Information Report (PIR) submission to the Office of Head Start. Data categories include: (1) Funded…

This article examines similarities and differences in Chilean teachers' competences, which were organized into profiles, and the associations of these profiles with children's language development. Teacher-child interactions were assessed when the children were 12 (n=99) and 30 months old (n=73), using the Adult Sensitivity Scale, the Evaluation…

We compared systematically the structure, the focus, the thematic sequences, the complexity and the syntactic properties between maternal and paternal infant-directed speech in engagements of infants with their mothers and fathers. Eleven mother-infant and 11 father-infant dyads were video-recorded during their natural interactions at home from…

This study explored the perceptions of practitioners who deliver the Baby Mat community-based, parent--infant mental healthcare intervention offered at primary healthcare clinics in Alexandra Township, South Africa. This intervention aims to foster secure attachments between mothers/caregivers and infants, shaping a healthy foundation for future…

This single case study was undertaken to explore how an infant head teacher meets the needs of the infants, who express their desire to be cared for, in their caring encounters. Natural daily interactions between infants and the teacher were observed for approximately 10 weeks. Through the qualitative data analysis, the results of this study…