This volume is concerned with how ambiguity and ambiguity resolution are learned, that is, with the acquisition of the different representations of ambiguous linguistic forms and the knowledge necessary for selecting among them in context. Schütze concentrates on how the acquisition of ambiguity is possible in principle and demonstrates that particular types of algorithms and learning architectures (such as unsupervised clustering and neural networks) can succeed at the task. Three types of lexical ambiguity are treated: ambiguity in syntactic categorisation, semantic categorisation, and verbal subcategorisation. The volume presents three different models of ambiguity acquisition: Tag Space, Word Space, and Subcat Learner, and addresses the importance of ambiguity in linguistic representation and its relevance for linguistic innateness.

The most frequently used words in English are highly ambiguous; for example, Webster's Ninth New Collegiate Dictionary lists 94 meanings for the word "run" as a verb alone. Yet people rarely notice this ambiguity. Solving this puzzle has commanded the efforts of cognitive scientists for many years. The solution most often identified is "context": we use the context of utterance to determine the proper meanings of words and sentences. The problem then becomes specifying the nature of context and how it interacts with the rest of an understanding system. The difficulty becomes especially apparent in the attempt to write a computer program to understand natural language. Lexical ambiguity resolution (LAR), then, is one of the central problems in natural language and computational semantics research. A collection of the best research on LAR available, this volume offers eighteen original papers by leading scientists. Part I, Computer Models, describes nine attempts to discover the processes necessary for disambiguation by implementing programs to do the job. Part II, Empirical Studies, goes into the laboratory setting to examine the nature of the human disambiguation mechanism and the structure of ambiguity itself. A primary goal of this volume is to propose a cognitive science perspective arising out of the conjunction of work and approaches from neuropsychology, psycholinguistics, and artificial intelligence--thereby encouraging a closer cooperation and collaboration among these fields. Lexical Ambiguity Resolution is a valuable and accessible source book for students and cognitive scientists in AI, psycholinguistics, neuropsychology, or theoretical linguistics.

Sets out state-of-the-art methodological and theoretical advancements to shed light on how bilingual speakers comprehend ambiguous information.

Semantic interpretation and the resolution of ambiguity presents an important advance in computer understanding of natural language. While parsing techniques have been greatly improved in recent years, the approach to semantics has generally improved in recent years, the approach to semantics has generally been ad hoc and had little theoretical basis. Graeme Hirst offers a new, theoretically motivated foundation for conceptual analysis by computer, and shows how this framework facilitates the resolution of lexical and syntactic ambiguities. His approach is interdisciplinary, drawing on research in computational linguistics, artificial intelligence, montague semantics, and cognitive psychology.

This is an exciting time for Artificial Intelligence, and for Natural Language Processing in particular. Over the last five years or so, a newly revived spirit has gained prominence that promises to revitalize the whole field: the spirit of empiricism. This book introduces a new approach to the important NLP issue of automatic ambiguity resolution, based on statistical models of text. This approach is compared with previous work and proved to yield higher accuracy for natural language analysis. An effective implementation strategy is also described, which is directly useful for natural language analysis. The book is noteworthy for demonstrating a new empirical approach to NLP; it is essential reading for researchers in natural language processing or computational linguistics.

Recent studies in psycho linguistics have ranged through a variety of languages. In this trend, which has no precedent, studies in language processing have followed studies in language acquisition and theoretical linguistics in considering language universals in a broader scope than only in English. Since the beginning of the century, studies in language acquisition have produced a vast body of data from a number of Indoeuropean languages, and the emphasis on the universal has preceded the emphasis on the particular (see (Slobin 1985) for a review). Nowadays, the research in the field advances by means of a continuous linking between the cross-linguistic uniformities and the individual language influences on development. The level of language universals is continuously refined as the data from a number of languages contribute to the elaboration of a more distinctive picture of the language of children. The first cross-linguistic studies in theoretical linguistics appeared at the end of the seventies. Within the Chomskian paradigm, the reference to the Romance languages caused a shift from a rule-based toward a principle-based formalism (Chomsky 1981, 1995); within alternative theories, the reduced prominence of the pure phrase structure component in favor of the lexicon and/or the functional relations (see, e.g., Lexical Functional Grammar (Bresnan 1982), Relational Grammar (Perlmutter 1983)) sought empirical support in languages exhibiting deep structural differences with respect to English (e.g. Bantu, Malayalam, Romance and Slavic languages Warlpiri). The M. De Vincenzi and V. Lombardo (eds.), Cross-linguistic Perspectives on Language Processing, 1-19.

Experimental Methods in Language Acquisition Research provides students and researchers interested in language acquisition with comprehensible and practical information on the most frequently used methods in language acquisition research. It includes contributions on first and child/adult second language learners, language-impaired children, and on the acquisition of both spoken and signed language. Part I discusses specific experimental methods, explaining the rationale behind each one, and providing an overview of potential participants, the procedure and data-analysis, as well as advantages and disadvantages and dos and don’ts. Part II focuses on comparisons across groups, addressing the theoretical, applied and methodological issues involved in such comparative work. This book will not only be of use to advanced undergraduate and postgraduate students, but also to any scholars wishing to learn more about a particular research method. It is suitable as a textbook in postgraduate programs in the fields of linguistics, education and psychology.

This book presents the complete collection of peer-reviewed presentations at the 1999 Cognitive Science Society meeting, including papers, poster abstracts, and descriptions of conference symposia. For students and researchers in all areas of cognitive science.

"The New Handbook of Second Language Acquisition" is a thoroughly revised, re-organized, and re-worked edition of Ritchie and Bhatia's 1996 handbook. The work is divided into six parts, each devoted to a different aspect of the study of SLA. Part I includes a recent history of methods used in SLA research and an overview of currently used methods. Part II contains chapters on Universal Grammar, emergentism, variationism, information-processing, sociocultural, and cognitive-linguistic. Part III is devoted to overviews of SLA research on lexicon, morphosyntax, phonology, pragmatics, sentence processing, and the distinction between implicit and explicit knowledge. Part IV examines neuropsycholgy of SLA, another on child SLA, and the effects of age on second language acquisition and use. Part V is concerned with the contribution of the linguistic environment to SLA, including work on acquisition in different environments, through the Internet, and by deaf learners. Finally, Part VI treats social factors in SLA, including research on acquisition in contact circumstances, on social identity in SLA, on individual differences in SLA, and on the final state of SLA, bilingualism.

Resolving Semantic Ambiguity arrrays the work of leading theorists on the issues surrounding the meaning and interpretation of ambiguous text. The chapters are organized around three major themes: (1) retrieval, (2) representation of words, and (3) text as a context. The book offers a number of new challenges to the role of context in language processing, some striking new evidence on the repetition of homographs in different contexts, and new approaches to resolution capable of being incorporated into either modular or network models. In several papers the problem of ambiguity is extended to include the problem of weak ambiguity and understanding text themes. The book provides a unique starting point for researchers approaching the problems of meaning in cognitive science, psychology, and computational linguistics.