This dissertation develops a cognitive model describing when children learn to group distinct sound segments (allophones) into abstract equivalence classes (phonemes). The allophones an individual acquires are arbitrary and determined by their particular input, yet are intricately involved in language cognition once learned. The proposed…

There is considerable controversy over the factors that shape infants' developing knowledge of grammar. Work with artificial languages suggests that infants' ability to track statistical regularities within the speech they hear could, in principle, support grammatical development. However, little work has tested whether infants' performance on…

It is said that children are amazing at acquiring their first language (L1); by the time they reach school age, they are using complex grammar and demonstrating a wide vocabulary. Even more impressive, these young learners might show up at school with two languages in their toolbox or add a second language (L2) with far less effort than older…

This is the first international and interdisciplinary handbook to offer a comprehensive and an in-depth overview of findings from contemporary research, theory, and practice in early childhood language education in various parts of the world and with different populations. The contributions by leading scholars and practitioners are structured to…

In children with a hearing loss who receive cochlear implants (CIs) under the age of 2, regular assessments are conducted to monitor auditory and linguistic progress. However, the collection of authentic, representative, and reliable expressive language data on young children with CIs remains a challenge. The purpose of the study was to determine…

The purpose of this study was to empirically examine the dimensionality of language ability for young children (4-8 years) from prekindergarten to third grade (n = 915), theorizing that measures of vocabulary and grammar ability will represent a unitary trait across these ages, and to determine whether discourse skills represent an additional…

Purpose: To evaluate the clinical utility of the narrative scoring scheme (NSS) as an index of narrative macrostructure for young school-age children. Method: Oral retells of a wordless picture book were elicited from 129 typically developing children, ages 5-7. A series of correlations and hierarchical regression equations were completed using…

Recent accounts of language acquisition propose that the knowledge structures that comprise language develop within a single, unified system that shares computational resources and representations. One implication of this approach is that developmental relations within the system become central to theorizing about language acquisition. Previous…

Parent report instruments adapted from the MacArthur-Bates Communicative Development Inventories (CDI) examined vocabulary development in children aged 0 ; 8 to 2 ; 6 for two Chinese languages, Mandarin (n = 1694) and Cantonese (n = 1625). Parental reports suggested higher overall scores for Mandarin- than for Cantonese-speaking children from…

Expressive vocabulary was studied in 130 children (ages 1 to 5 years) with Down syndrome. Although there was continuous growth in expressive referential vocabulary from birth through 5 years, age 5 was found to be an important developmental marker for multiword combinations and grammatical vocabulary. (Author/CR)

Studies using the English and Spanish MacArthur Communicative Development Inventories demonstrated that the grammatical abilities of 20--30-month-old bilingual children were related more strongly to same-language vocabulary development than to broader lexical-conceptual development or maturation. First, proportions of different word types in each…

Parent-based assessments of vocabulary, grammar, nonverbal ability, and use of language to refer to past and future were obtained for 8,386 twins at age 2. Of the children who had early language delay, 44.1% had persisting language difficulties at 3 years and 40.2% had persisting language difficulties at 4 years. (Contains references.) (CR)

A study involving 356 twin pairs with early language delay found environmental influences shared by both twins were more substantial than genetic factors. Heritability was significantly higher in those with persisting difficulties but only when assessed in terms of parental concern at 3 years or professional involvement at 4 years. (Contains…

Examined how child and family factors influence individual differences in the language development of African-American children between 18 and 30 months of age. Found that vocabulary and utterance length increased linearly. Children from more stimulating and responsive homes had larger vocabularies, used more irregular nouns and verbs, and had…

This book is the second to present the results on a study of how children's practice of speech, as shaped by family interaction, affects learning to talk. Participating in the study were 42 diverse families with young children. Each month for 2.5 years the interactions between 42 one- to two-year-olds and their parents were recorded as the…