First Published in 1991. Routledge is an imprint of Taylor & Francis, an informa company.

This book presents a current, interdisciplinary perspective on language requisites from both a biological/comparative perspective and from a developmental/learning perspective. Perspectives regarding language and language acquisition are advanced by scientists of various backgrounds -- speech, hearing, developmental psychology, comparative psychology, and language intervention. This unique volume searches for a rational interface between findings and perspectives generated by language studies with humans and with chimpanzees. Intended to render a reconsideration as to the essence of language and the requisites to its acquisition, it also provides readers with perspectives defined by various revisionists who hold that language might be other than the consequence of a mutation unique to humans and might, fundamentally, not be limited to speech.

Imagine a child who has never seen or heard any language at all. Would such a child be able to invent a language on her own? Despite what one might guess, the children described in this book make it clear that the answer to this question is 'yes'. The children are congenitally deaf and cannot learn the spoken language that surrounds them. In addition, they have not yet been exposed to sign language, either by their hearing parents or their oral schools. Nevertheless, the children use their hands to communicate - they gesture - and those gestures take on many of the forms and functions of language. The properties of language that we find in the deaf children's gestures are just those properties that do not need to be handed down from generation to generation, but can be reinvented by a child de novo - the resilient properties of language. This book suggests that all children, deaf or hearing, come to language-learning ready to develop precisely these language properties. In this way, studies of gesture creation in deaf children can show us the way that children themselves have a large hand in shaping how language is learned.

20 years ago Pepperberg set out to discover whether results of pigeon studies necessarily meant that other birds were incapable of mastering cognitive concepts and the rudiments of referential speech. This is a synthesis of her studies.

This text, part of a set that offers selected examples of issues and theories from many subfields of cognitive science, focuses on language. It employs a case study approach, presenting research topics in some depth and relying on suggested readings to convey the breadth of views and results.

For at least 30 years, there have been close parallels between studies of birdsong development and those of the development of human language. Both song and language require species-specific stimulation at a sensitive period in development and subsequent practice through subsong and plastic song in birds and babbling in infant humans leading to the development of characteristic vocalisations for each species. This book illustrates how social interactions during development can shape vocal learning and extend the sensitive period beyond infancy and how social companions can induce flexibility even into adulthood. Social companions in a wide range of species including birds and humans but also cetaceans and nonhuman primates play important roles in shaping vocal production as well as the comprehension and appropriate usage of vocal communication. This book will be required reading for students and researchers interested in animal and human communication and its development.

Psycholinguist Boysson-Bardies presents a broad picture of language development, from foetal development to the toddler years. She addresses questions of particular concern to parents, such as how one can facilitate language learning.