The way a young child uses language has an impact on their future life. Early language acquisition is a determinant in adult employment, mental health and relationships with others. At the same time there is a broad evidence base that play and learning in the natural environment is beneficial for young children's physical, emotional, social and…

The National Institute for Early Education Research (NIEER) conducted a landscape evaluation of early childhood programs in Indiana (IN) between the spring of 2021 and the summer of 2022. The evaluation included assessments of infant, toddler, and preschooler children's developmental status in multiple domains at two time points to measure growth.…

Mutualism is a developmental theory that posits positive reciprocal relationships between distinct cognitive abilities during development. It predicts that abilities such as language and reasoning will influence each other's rates of growth. This may explain why children with Language Disorders also tend to have lower than average non-verbal…

Developmental science has increasingly scrutinized how environmental hazards influence child outcomes, but few studies examine how contaminants affect disparities in early skill formation. Linking research on environmental inequality and early childhood development, this study assessed whether differences in exposure to neurotoxic lead explain…

Very large numbers words such as "hundred," "thousand," "million," "billion," and "trillion" pose a learning problem for children because they are sparse in everyday speech and children's experience with extremely large quantities is scarce. In this study, we examine when children acquire the…

Phonological awareness is taught from preschool onwards because of its impact on later reading skills. Numerous assessments and training sessions are available to guide childcare professionals. Most of them offer phonological sessions based on the use of pictures or visual aids. However, only few studies have shown the benefits of using this type…

The collocation frequency of words in the language environment contributes to early vocabulary development. Vocabulary size, in turn, predicts children's reading comprehension skills later in development. Both collocation frequency and reading comprehension have been connected to inferential reasoning at different time points in development. Here,…

Numerous studies have examined the positive and negative effects of various types of interactions that occur while children view electronic book (e-book) stories. However, the effects of the different types of interactions have not been compared, and more importantly, the optimal amount and reoccurrence of these interactions on children has not…

In this study, I examined preschool storybook apps for the affordances they may provide for young children's vocabulary development. Specifically, I sought to understand (a) the degree to which storybook apps introduce new words, (b) the types of words children can learn, and (c) the degree to which digital enhancements align with new words in the…

Purpose: This study compares responses of children who are deaf and hard of hearing (DHH) who use spoken language with responses of children who have typical hearing on a repeated word association task to evaluate lexical-semantic organization. Method: This study included 109 participants in early kindergarten or who had completed first grade. The…

The purpose of this study was to compare three intervention conditions in virtual rapid word learning instruction for young children who are deaf and hard of hearing (DHH): traditional, general physical activity, and semantic richness physical activity. We focused on an initial step in learning a new word: mapping a word form to a referent.…

Purpose: This study examined how mothers' question-asking behavior relates to their child's syntactic skills. One important aspect of maternal question-asking behavior is the use of complex questions when speaking with children. These questions can differ based on both their purpose and structure. The purpose may be to seek out information, to…

This study investigated the acquisition of early expressive vocabulary among young children who are deaf and hard-of-hearing (DHH; n = 68) using auditory technology (hearing aids and cochlear implants). Parents completed a standardized vocabulary checklist, which allowed analyses of (i) the size of their child's spoken vocabulary; (ii) composition…

Children learn language by listening to speech from caregivers around them. However, the type and quantity of speech input that children are exposed to change throughout early childhood in ways that are poorly understood due to the small samples (few participants, limited hours of observation) typically available in developmental psychology. Here…

Bilingual environments present an important context for word learning. One feature of bilingual environments is the existence of translation equivalents (TEs)--words in different languages that share similar meanings. Documenting TE learning over development may give us insight into the mechanisms underlying word learning in young bilingual…