This book brings together papers which address a range of issues regarding the nature and structure of sign languages and other gestural systems, and how they exploit the space in which they are conveyed. The chapters focus on five pertinent areas reflecting different, but related research topics: * space in language and gesture, * point of view and referential shift, * morphosyntax of verbs in ASL, * gestural systems and sign language, and * language acquisition and gesture. Sign languages and gestural systems are produced in physical space; they manipulate spatial contrasts for linguistic and communicative purposes. In addition to exploring the different functions of space, researchers discuss similarities and differences between visual-gestural systems -- established sign languages, pidgin sign language (International Sign), "homesign" systems developed by deaf children with no sign language input, novel gesture systems invented by hearing nonsigners, and the gesticulation that accompanies speech. The development of gesture and sign language in children is also examined in both hearing and deaf children, charting the emergence of gesture ("manual babbling"), its use as a prelinguistic communicative device, and its transformation into language-like systems in homesigners. Finally, theoretical linguistic accounts of the structure of sign languages are provided in chapters dealing with the analysis of referential shift, the structure of narrative, the analysis of tense and the structure of the verb phrase in American Sign Language. Taken together, the chapters in this volume present a comprehensive picture of sign language and gesture research from a group of international scholars who investigate a range of communicative systems from formal sign languages to the gesticulation that accompanies speech.

This book brings together papers which address a range of issues regarding the nature and structure of sign languages and other gestural systems, and how they exploit the space in which they are conveyed. The chapters focus on five pertinent areas reflecting different, but related research topics:
* space in language and gesture,
* point of view and referential shift,
* morphosyntax of verbs in ASL,
* gestural systems and sign language, and
* language acquisition and gesture.
Sign languages and gestural systems are produced in physical space; they manipulate spatial contrasts for linguistic and communicative purposes. In addition to exploring the different functions of space, researchers discuss similarities and differences between visual-gestural systems -- established sign languages, pidgin sign language (International Sign), "homesign" systems developed by deaf children with no sign language input, novel gesture systems invented by hearing nonsigners, and the gesticulation that accompanies speech. The development of gesture and sign language in children is also examined in both hearing and deaf children, charting the emergence of gesture ("manual babbling"), its use as a prelinguistic communicative device, and its transformation into language-like systems in homesigners. Finally, theoretical linguistic accounts of the structure of sign languages are provided in chapters dealing with the analysis of referential shift, the structure of narrative, the analysis of tense and the structure of the verb phrase in American Sign Language. Taken together, the chapters in this volume present a comprehensive picture of sign language and gesture research from a group of international scholars who investigate a range of communicative systems from formal sign languages to the gesticulation that accompanies speech.

Classifier constructions are universal to sign languages and exhibit unique properties that arise from the nature of the visual-gestural modality. The major goals are to bring to light critical issues related to the study of classifier constructions and to present state-of-the-art linguistic and psycholinguistic analyses of these constructions. It is hoped that by doing so, more researchers will be inspired to investigate the nature of classifier constructions across signed languages and further explore the unique aspects of these forms. The papers in this volume discuss the following issues: *how sign language classifiers differ from spoken languages; *cross-linguistic variation in sign language classifier systems; *the role of gesture; *the nature of morpho-syntactic and phonological constraints on classifier constructions; *the grammaticization process for these forms; and *the acquisition of classifier forms. Divided into four parts, groups of papers focus on a particular set of issues, and commentary papers end each section.

Classifier constructions are universal to sign languages and exhibit unique properties that arise from the nature of the visual-gestural modality. The major goals are to bring to light critical issues related to the study of classifier constructions and to present state-of-the-art linguistic and psycholinguistic analyses of these constructions. It is hoped that by doing so, more researchers will be inspired to investigate the nature of classifier constructions across signed languages and further explore the unique aspects of these forms.
The papers in this volume discuss the following issues:
*how sign language classifiers differ from spoken languages;
*cross-linguistic variation in sign language classifier systems;
*the role of gesture;
*the nature of morpho-syntactic and phonological constraints on classifier constructions;
*the grammaticization process for these forms; and
*the acquisition of classifier forms.
Divided into four parts, groups of papers focus on a particular set of issues, and commentary papers end each section.

The burgeoning of research on signed language during the last two decades has had a major influence on several disciplines concerned with mind and language, including linguistics, neuroscience, cognitive psychology, child language acquisition, sociolinguistics, bilingualism, and deaf education. The genealogy of this research can be traced to a remarkable degree to a single pair of scholars, Ursula Bellugi and Edward Klima, who have conducted their research on signed language and educated scores of scholars in the field since the early 1970s. The Signs of Language Revisited has three major objectives: * presenting the latest findings and theories of leading scientists in numerous specialties from language acquisition in children to literacy and deaf people; * taking stock of the distance scholarship has come in a given field, where we are now, and where we should be headed; and * acknowledging and articulating the intellectual debt of the authors to Bellugi and Klima--in some cases through personal reminiscences. Thus, this book is also a document in the sociology and history of science.

Once signed languages are recognized as natural human languages, a world of exploration opens up. Signed languages provide a powerful tool for investigating the nature of human language and language processing, the relation between cognition and language, and the neural organization of language. The value of sign languages lies in their modality. Specifically, for perception, signed languages depend upon high-level vision and motion processing systems, and for production, they require the integration of motor systems involving the hands and face. These facts raise many questions: What impact does this different biological base have for grammatical systems? For online language processing? For the acquisition of language? How does it affect nonlinguistic cognitive structures and processing? Are the same neural systems involved?
These are some of the questions that this book aims at addressing. The answers provide insight into what constrains grammatical form, language processing, linguistic working memory, and hemispheric specialization for language. The study of signed languages allows researchers to address questions about the nature of linguistic and cognitive systems that otherwise could not be easily addressed.

Once signed languages are recognized as natural human languages, a world of exploration opens up. Signed languages provide a powerful tool for investigating the nature of human language and language processing, the relation between cognition and language, and the neural organization of language. The value of sign languages lies in their modality. Specifically, for perception, signed languages depend upon high-level vision and motion processing systems, and for production, they require the integration of motor systems involving the hands and face. These facts raise many questions: What impact does this different biological base have for grammatical systems? For online language processing? For the acquisition of language? How does it affect nonlinguistic cognitive structures and processing? Are the same neural systems involved?
These are some of the questions that this book aims at addressing. The answers provide insight into what constrains grammatical form, language processing, linguistic working memory, and hemispheric specialization for language. The study of signed languages allows researchers to address questions about the nature of linguistic and cognitive systems that otherwise could not be easily addressed.