Almost five million children attend preschool in the United States each year. Recent attention has been paid to the ways in which preschool classrooms shape children's early language development. This article discusses the importance of peers and classroom composition through the lens of age and socioeconomic status and the implications for…

In previous research the "Joan Ganz Cooney Center" and "New America" have characterized the children's educational app market as a "Digital Wild West" (Guernsey, Levine, Chiong & Severns, 2012; Shuler, 2011). The marketplace is chock full of choices but lacks essential information to aid parents' and educators'…

A focused scientific research effort on writing research and its relationship to language development and reading is needed to address the writing and broader literacy needs of today's and tomorrow's learners and workers. In the United States, as well as in many other nations, research on writing has been neglected in relation to the emphasis on…

Using behavioral, structural, and functional imaging techniques, we demonstrate contrasting effects of vocabulary knowledge on temporal and parietal brain structure in 47 healthy volunteers who ranged in age from 7 to 73 years. In the left posterior supramarginal gyrus, vocabulary knowledge was positively correlated with gray matter density in…

This paper is based on a presentation given at National Council of Teachers of Mathematics (NCTM) in 2005 in Anaheim, California. It explicates the developmental stages of the child as posited by Piaget. The author then ties each of the stages to developmentally appropriate mathematics instruction. The implications in terms of not imposing…

Cognitive and language skills of 39 siblings of children with autism (SIBS-A) and 39 siblings of typically developing children (SIBS-TD) at ages 4, 14, 24, 36, and 54 months were compared. Twelve of the 39 SIBS-A revealed a delay in cognition and/or language (including one child diagnosed with autism) compared to only two SIBS-TD. Developmental…

The question of what to look for when visiting early childhood classrooms can be addressed on the basis of a set of fundamental developmental principles. In this article, the author outlines five developmental principles that can be invoked when seeking answers to the question every educator must address when creating a curriculum, namely: What…

This article describes how parents foster emotional development in their children through the words they speak during daily conversations. The author presents a case study of a father and his infant daughter and the developmental progression of talk. In the first 6 months of life, talk revolved around the infant's feelings, and later in the…

A description of the pragmatic functions of word order in the Bantu language, Sesotho, and of how children begin to produce them illustrates the developmental trends characterizing Sesotho-speaking children's learning of different word orders. It supports findings from previous language acquisition studies that have indicated that children tend…

In examining the issue of why children do so well at language learning despite limited skill and experience, two possible explanations are addressed: one suggests that children learn language well exactly because they are limited, and the other proposes that children are extremely adept at language learning, perhaps more so than adults. Research…

As the articles in this issue attest, U-shaped curves in development have stimulated a wide spectrum of research across disparate task domains and age groups and have provoked a variety of ideas about their origins and theoretical significance. In the authors' view, the ubiquity of the general pattern suggests that U-shaped curves can arise from…

This study examined the prevalence of otitis media with effusion (OME) in 14 children (ages 8-66 months) with developmental disabilities attending center-based childcare. Although younger children had more OME than older children, children with Down syndrome had the highest incidence of OME regardless of age. Implications of OME for fluctuating…

The aim of this article is to introduce readers to an alternative way of applying U-shaped functions to understand development, especially cognitive development. In classical developmental applications, age is the abscissa; that is, in the fundamental equation B = f(A), some behavioral variable (B) plots as a U-shaped or inverted U-shaped function…

This article discusses issues in measuring lexical diversity, before outlining an approach based on mathematical modelling that produces a measure, D, designed to address these problems. The procedure for obtaining values for D directly from transcripts using software (vocd) is introduced, and then applied to thirty-two children from the Bristol…

This article describes the Colorado Phonetic/Phonologic Assessment of Hearing-Impaired Infants and Toddlers (PHONE) and the speech of 91 hearing-impaired infants and toddlers, examining number of vowels, consonants, elements per utterance, and utterances; differences by age and by hearing loss for each vowel and consonant; and relationship to…