The chapters in this volume provide the first comprehensive overview of trends in research on early phonological, lexical, syntactic and pragmatic development in children acquiring two (or more) languages simultaneously. Ongoing as well as emerging issues are examined and discussed by leading researchers in the field. Collectively, these studies extend our knowledge of bilingual acquisition and broaden our understanding of the child's ability to acquire and use language. This volume is of interest to researchers working on language acquisition by monolingual and bilingual children, graduate students of psychology, linguistics and communication sciences, and researchers and professionals concerned with the diagnosis and treatment of bilingual children with language impairment.

This volume presents recent generative research on the nature of grammars of child second language (L2) acquirers -- a learner population whose exposure to an L2 occurs between the ages of 4 to 8. The main goal is to define child L2 acquisition in relation to other types of acquisition such as child monolingual and bilingual acquisition, adult L2 acquisition, and specific language impairment. This comparative perspective opens up new angles for the discussion of currently debated issues such as the role of Universal Grammar in constraining development, developmental sequences in L2, maturational influences on the 'growth' of grammar, critical period effects for different linguistic domains, initial state and ultimate attainment in relation to length of exposure, and L1-transfer in relation to age of onset. These issues are explored using longitudinal, cross-sectional, and experimental data from L2 children acquiring a range of languages, including Dutch, English, French, and Greek.

This book presents the latest developments in crosslinguistic influence (CLI) and multilingualism research. The contributors, both veteran researchers and relative newcomers to the field, situate their research in current debates in terms of theory and data analysis and they present it in an accessible way. The chapters investigate how and when native and non-native language knowledge is used in language production. They focus on lexis, syntax, tense-aspect, phonology of multilingual production and link it to a range of concepts such as redundancy, affordances, metalinguistic awareness and L2 status. The empirical data have been collected from participants with a wide combination of languages: besides English, German, French and Spanish, there is Finnish, Swedish, Polish, Chinese and Catalan.

Differential Object marking (DOM), a linguistic phenomenon in which a direct object is morphologically marked for semantic and pragmatic reasons, has attracted the attention of several subfields of linguistics in the past few years. DOM has evolved diachronically in many languages, whereas it has disappeared from others; it is easily acquired by monolingual children, but presents high instability and variability in bilingual acquisition and language contact situations. This edited collection contributes to further our understanding of the nature and development of DOM in the languages of the world, in acquisition, and in language contact, variation, and change. The thirteen chapters in this volume present new empirical data from Estonian, Spanish, Turkish, Korean, Hindi, Romanian and Basque in different acquisition contexts and learner populations. They also bring together multiple theoretical and methodological perspectives to account for the complexity and dynamicity of this widespread linguistic phenomenon.

This book presents a comprehensive, state-of-the-art treatment of the acquisition of Indo- and Non-Indo-European languages in various contexts, such as L1, L2, L3/Ln, bi/multilingual, heritage languages, pathology as well as language impairment, and sign language acquisition. The book explores a broad mix of methodologies and issues in contemporary research. The text presents original research from several different perspectives, and provides a basis for dialogue between researchers working on diverse projects with the aim of furthering our understanding of how languages are acquired. The book proposes and refines new theoretical constructs, e.g. regarding the complexity of linguistic features as a relevant factor forming children’s, adults’ and bilingual individuals’ acquisition of morphological, syntactic, discursive, pragmatic, lexical and phonological structures. It appeals to students, researchers, and professionals in the field.

In recent years the field has seen an increasing realisation that the full complexity of language acquisition demands theories that (a) explain how children integrate information from multiple sources in the environment, (b) build linguistic representations at a number of different levels, and (c) learn how to combine these representations in order to communicate effectively. These new findings have stimulated new theoretical perspectives that are more centered on explaining learning as a complex dynamic interaction between the child and her environment. This book is the first attempt to bring some of these new perspectives together in one place. It is a collection of essays written by a group of researchers who all take an approach centered on child-environment interaction, and all of whom have been influenced by the work of Elena Lieven, to whom this collection is dedicated.

Developmental research has long focused on regularities in language acquisition, minimizing factors that might be responsible for variation. Although researchers are now increasingly concerned with one or another of these factors, this volume brings together research on three different sources of variation: language-specific properties, the nature of the input to children across contexts, and several aspects of the learners themselves. Chapters explore these sources of variation within an interdisciplinary and comparative approach allying theories and methodologies stemming from linguistics, psycholinguistics, developmental psychology, and neuroscience. The comparative perspective involves different languages, contexts of use, types of learners (first/second language acquisition, monolingual/bilingual learners, autism, language impairment), as well as vocal and visuo-gestural communicative modalities (co-verbal gestures, sign language acquisition). The volume points to the need to enhance interdisciplinary research using complementary methodologies to further examine sources of variation and to integrate variation into a more general developmental theory.