This volume is one in a series of monographs being issued under the general title of "Disorders of Human Communication". Each monograph deals in detail with a particular aspect of vocal communication and its disorders, and is written by internationally distinguished experts. Therefore, the series will provide an authoritative source of up-to-date scientific and clinical informa tion relating to the whole field of normal and abnormal speech communication, and as such will succeed the earlier monumental work "Handbuch der Stimm und Sprachheilkunde" by R. Luchsinger and G. E. Arnold (last issued in 1970). This series will prove invaluable for clinicians, teachers and research workers in phoniatrics and logopaedics, phonetics and linguistics, speech pathology, otolaryngology, neurology and neurosurgery, psychology and psychiatry, paediatrics and audiology. Several of the monographs will also be useful to voice and singing teachers, and to their pupils. G. E. Arnold, Jackson, Miss. F. Winckel, Berlin B. D. Wyke, London Preface This book tries to illustrate the practice as well as the principles involved in applying linguistics to the analysis of language disability. In writing it, I have as sumed an audience of professional speech and hearing clinicians who have had little or no formal training in linguistics. Each Chapter therefore begins with a resu me of the main theoretical and descriptive principles needed in order to carry out a clinical linguistic analysis. The relevance oflanguage acquisition studies is a major theme within this resume.

Is language somehow innate in the structure of the human brain, or is it completely learned? This debate is still at the heart of linguistics, especially as it intersects with psychology and cognitive science. In collecting papers which discuss the evidence and arguments regarding this difficult question, The Inheritance and Innateness of Grammars considers cases ranging from infants who are just beginning to learn the properties of a native language to language-impaired adults who will never learn one. These studies show that, while precursors of language exist in other creatures, the abilities necessary for constructing full-fledged grammars are part of the biological endowment of human beings. The essays that comprise this volume test the range and specificity of that endowment, while also contributing to our understanding of the intricate and complex relationship between language and biology.