Language and the Human Lifespan (LHLS)

In recent years, linguists have increasingly turned to the cognitive sciences to broaden their investigation into the roots and development of language. With the advent of cognitive-linguistic, usage-based and complex-adaptive models of language, linguists today are utilizing approaches and insights from cognitive psychology, neuropsychology, social psychology and other related fields.

A key result of this interdisciplinary approach is the concept of entrenchment—the ongoing reorganization and adaptation of communicative knowledge. Entrenchment posits that our linguistic knowledge is continuously refreshed and reorganized under the influence of social interactions. It is part of a larger, ongoing process of lifelong cognitive reorganization whose course and quality is conditioned by exposure to and use of language, and by the application of cognitive abilities and processes to language.

This volume enlists more than two dozen experts in the fields of linguistics, psycholinguistics, neurology, and cognitive psychology in providing a realistic picture of the psychological and linguistic foundations of language. Contributors examine the psychological foundations of linguistic entrenchment processes, and the role of entrenchment in first-language acquisition, second language learning, and language attrition. Critical views of entrenchment and some of its premises and implications are discussed from the perspective of dynamic complexity theory and radical embodied cognitive science.

In recent decades, a growing number of children have been diagnosed with autism spectrum disorder (ASD), a condition characterized by, among other features, social interaction deficits and language impairment. Yet the precise nature of the disorder’s impact on language development is not well understood, in part because of the language variability among children across the autism spectrum. The contributors to this volume — experts in fields ranging from communication disorders to developmental and clinical psychology to linguistics — use innovative techniques to address two broad questions: Is the variability of language development and use in children with ASD a function of the language, such that some linguistic domains are more vulnerable to ASD than others? Or is the variability a function of the individual, such that some characteristics predispose those with ASD to have varying levels of difficulty with language development and use? Contributors investigate these questions across linguistic levels, from lexical semantics and single-clause syntax, to computationally complex phonology and the syntax-pragmatics interface. Authors address both spoken and written domains within the wider context of language acquisition. This timely and broadly accessible volume will be of interest to a broad range of specialists, including linguists, psychologists, sociologists, behavioral neurologists, and cognitive neuroscientists.

Language acquisition research is challenging—the intricate behavioral and cognitive foundations of speech are difficult to measure objectively. The audible components of speech, however, are quantifiable and thus provide crucial data. This practical guide synthesizes the authors’ decades of experience into a comprehensive set of tools that will allow students and early career researchers in the field to design and conduct rigorous studies that produce reliable and valid speech data and interpretations.

The authors thoroughly review specific techniques for obtaining qualitative and quantitative speech data, including how to tailor the testing environments for optimal results. They explore observational tasks for collecting natural speech and experimental tasks for eliciting specific types of speech. Language comprehension tasks are also reviewed so researchers can study participants’ interpretations of speech and conceptualizations of grammar. Most tasks are oriented towards children, but special considerations for infants are also reviewed, as well as multilingual children.

Chapters also provide strategies for transcribing and coding raw speech data into reliable data sets that can be scientifically analyzed. Furthermore, they investigate the intricacies of interpretation so that researchers can make empirically sound inferences from their data and avoid common pitfalls that can lead to unscientific conclusions.

This book pioneers the study of bilingualism across the lifespan and in all its diverse forms. In framing the newest research within a lifespan perspective, the editors highlight the importance of considering an individual's age in researching how bilingualism affects language acquisition and cognitive development. A key theme is the variability among bilinguals, which may be due to a host of individual and sociocultural factors, including the degree to which bilingualism is valued within a particular context.Thus, this book is a call for language researchers, psychologists, and educators to pursue a better understanding of bilingualism in our increasingly global society.