Discusses how a theory of language development must explain what develops and how development proceeds. Explaining what develops involves creating sequential theories of developing competence that converge to an adult theory, and explaining how development proceeds involves creating theories of the mechanisms of change responsible for movement…

Considers methodological issues related to the study of children who were raised with two languages from birth. Functions as the introduction to this special issue of the journal. (Author/VWL)

Examined whether infants succeed in mapping novel adjectives applied ostensively to individual objects and to other objects with the same property. Found that infants hearing a target labeled with novel adjectives were more likely than those hearing no novel words to choose a matching test object when all objects were drawn from same basic level…

Examines how babies exposed to two languages simultaneously acquire the meanings of words across their two languages. Particular focus was on whether babies know that they are acquiring different lexicons right from the start or whether early bilingual exposure causes them to be semantically confused. (Author/VWL)

The aim of this article is to provide clinicians and researchers a comprehensive overview of the development and functions of gesture in childhood and in select populations with developmental language impairments. Of significance is the growing body of evidence that gesture enhances, not hinders, language development. In both normal and impaired…

This study followed 18 children with developmental disabilities, whose chronological ages were between 3 years and 6 years at the start of the study, over a 2-year period. At initial observation, children communicated primarily through prelinguistic gestures, vocalizations, and single-word utterances. Children's language skills were measured every…

The history of western societies reveals a recurring theme of standing up for the child's perspective in order to liberate the child from external authority. On the one hand this is related to the rise of enlightened theories of education since the seventeenth century. On the other hand this is related to radical changes in life circumstances of…

We examine the question of which aspects of language are uniquely human and uniquely linguistic in light of recent suggestions by Hauser, Chomsky, and Fitch that the only such aspect is syntactic recursion, the rest of language being either specific to humans but not to language (e.g. words and concepts) or not specific to humans (e.g. speech…

Recognising the grammatical categories of words is a necessary skill for the acquisition of syntax and for on-line sentence processing. The syntactic and semantic context of the word contribute as cues for grammatical category assignment, but phonological cues, too, have been implicated as important sources of information. The value of…

Although Benign Childhood Epilepsy with Centrotemporal Spikes (BECTS) has a good prognosis, a few studies have suggested the existence of language disorders relating to the interictal dysfunction of perisylvian language areas. In this study, we focused on language assessment in 16 children aged 6-15 currently affected by BECTS or in remission. An…

Four experiments examined reference systems in spatial memories acquired from language. Participants read narratives that located 4 objects in canonical (front, back, left, right) or noncanonical (left front, right front, left back, right back) positions around them. Participants' focus of attention was first set on each of the 4 objects, and then…

A current limitation of the connectionist approach to second language acquisition (SLA) research is that it does not, to my knowledge, include complex linguistic representations. This article proposes a partial solution to this limitation by motivating and illustrating specific analyses that utilize the signbased representations developed within…

Joint attention is an early-developing social-communicative skill in which two people (usually a young child and an adult) use gestures and gaze to share attention with respect to interesting objects or events. This skill plays a critical role in social and language development. Impaired development of joint attention is a cardinal feature of…

The human potential for language is based in human biology but makes requirements of the social environment to be realized. This paper reports evidence regarding (1) the nature of those environmental requirements, (2) the ways in which the varied social contexts in which children live meet those requirements, and (3) the effects of environmental…

Effects of negative input for 13 categories of grammatical error were assessed in a longitudinal study of naturalistic adult-child discourse. Two-hour samples of conversational interaction were obtained at two points in time, separated by a lag of 12 weeks, for 12 children (mean age 2;0 at the start). The data were interpreted within the framework…