This book represents the state of the art in the study of gradience in grammar - the degree to which utterances are acceptable or grammatical, and the relationship between acceptability and grammaticality. Gradience is at the centre of controversial issues in the theory of grammar and the understanding of language. The acceptability of words and sentences may be linked to the frequency of their use and measured on a scale. Among the questions considered in the book are: whether such measures are beyond the scope of a generative grammar or, in other words, whether the factors influencing acceptability are internal or external to grammar; whether observed gradience is a property of the mentally represented grammar or a reflection of variation among speakers; and what gradient phenomena reveal about the relationship between acceptability and grammaticality, and between competence and performance. The book is divided into four parts. Part I seeks to clarify the nature of gradience from the perspectives of phonology, generative syntax, psycholinguistics, and sociolinguistics. Parts II and III examine issues in phonology and syntax. Part IV considers long wh-movement from different methodological perspectives. The data discussed comes from a wide range of languages and dialects, and includes tone and stress patterns, word order variation, and question formation. Gradience in Grammar will interest linguists concerned with the understanding of syntax, phonology, language acquisition and variation, discourse, and the operations of language within the mind.

This book represents the state of the art in the study of gradience in grammar - the degree to which utterances are acceptable or grammatical, and the relationship between acceptability and grammaticality. Gradience is at the centre of controversial issues in the theory of grammar and the understanding of language. The acceptability of words and sentences may be linked to the frequency of their use and measured on a scale. Among the questions considered in the book are: whether such measures are beyond the scope of a generative grammar or, in other words, whether the factors influencing acceptability are internal or external to grammar; whether observed gradience is a property of the mentally represented grammar or a reflection of variation among speakers; and what gradient phenomena reveal about the relationship between acceptability and grammaticality, and between competence and performance. The book is divided into four parts. Part I seeks to clarify the nature of gradience from the perspectives of phonology, generative syntax, psycholinguistics, and sociolinguistics. Parts II and III examine issues in phonology and syntax. Part IV considers long wh-movement from different methodological perspectives. The data discussed comes from a wide range of languages and dialects, and includes tone and stress patterns, word order variation, and question formation. Gradience in Grammar will interest linguists concerned with the understanding of syntax, phonology, language acquisition and variation, discourse, and the operations of language within the mind.

This is the first exhaustive investigation of gradience in syntax, conceived of as grammatical indeterminacy. It looks at gradience in English word classes, phrases, clauses and constructions, and examines how it may be defined and differentiated. Bas Aarts draws on, and reviews, work in psychology, philosophy and language from Aristotle to Chomsky, and writes clearly on a fascinating and important aspect of language and cognition.

This book provides an overview of current issues in variation and gradience in phonetics, phonology and sociolinguistics. It contributes to the growing interest in gradience and variation in theoretical phonology by combing research on the factors underlying variability and systematic quantitative results with theoretical phonological considerations. Variation is inherent to language, and one of the aims of phonological theory is to describe and explain the mechanisms underlying variation at every level of phonological representation. Variation below the segment concerns articulatory, acoustic and perceptual cues that contribute to the formation of natural classes of sounds. At the segmental level there are grammatical differences in the production and perception of contextual variation of segments and in the syntagmatic constraints on the combination of segments. At the suprasegmental level the mapping of tones to grammatical functions and vice versa is discussed. Further aspects addressed in this book are factors outside of language: Variation that arises as a result of a particular dialect or of belonging to a certain age group, or variation that is the consequence of language change. Gradience and variation have always been a central issue in phonetic and sociolinguistic research. Gradience introduces variation in phonology as well. If a phonetic entity can be pronounced in different ways, depending on the environment, prosodic factors or dialectal influences, this ‘gradience’ may introduce ‘variation’, which we understand as a stable state of grammar.

This book examines a challenging problem at the intersection of theoretical linguistics and the psychology of language: the interpretation of gradient judgments of sentence acceptability in relation to theories of grammatical knowledge. Acceptability judgments constitute the primary source of data on which such theories have been built, despite being susceptible to various extra-grammatical factors. Through a review of experimental and corpus-based research on a variety of syntactic phenomena and an in-depth examination of two case studies, Elaine J. Francis argues for two main positions. The first is that converging evidence from online comprehension tasks, elicited production tasks, and corpora of naturally-occurring discourse can help to determine the sources of variation in acceptability judgments and to narrow down the range of plausible theoretical interpretations. The second is that the interpretation of judgment data depends crucially on the theoretical commitments and assumptions made, especially with respect to the nature of the syntax-semantics interface and the choice of either a categorical or a gradient notion of grammaticality. The theoretical frameworks considered in this book include derivational theories (e.g. Minimalism, Principles and Parameters), constraint-based theories (e.g. Sign-based Construction Grammar, Simpler Syntax), competition-based theories (e.g. Stochastic Optimality Theory, Decathlon Model), and usage-based approaches. The volume shows that while acceptability judgment data are typically compatible with the assumptions of various theoretical frameworks, some gradient phenomena are best captured within frameworks that permit soft constraints-non-categorical grammatical constraints that encode the conventional preferences of language users.

This thesis deals with gradience in grammar, i.e., with the fact that some linguistic structures are not fully acceptable or unacceptable, but receive gradient linguistic judgments. The importance of gradient data for linguistic theory has been recognized at least since Chomsky's Logical Structure of Linguistic Theory. However, systematic empirical studies of gradience are largely absent, and none of the major theoretical frameworks is designed to account for gradient data. The present thesis addresses both questions. In the experimental part of the thesis (Chapters 3-5), we present a set of magnitude estimation experiments investigating gradience in grammar. The experiments deal with unaccusativity/unergativity, extraction, binding, word order, and gapping. They cover all major modules of syntactic theory, and draw on data from three languages (English, German, and Greek). In the theoretical part of thesis (Chapters 6 and 7), we use these experimental results to motivate a model of gradience in grammar. This model is a variant of Optimality Theory, and explains gradience in terms of the competition of ranked, violable linguistic constraints. The experimental studies in this thesis deliver two main results. First, they demonstrate that an experimental investigation of gradient phenomena can advance linguistic theory by uncovering acceptability distinctions that have gone unnoticed in the theoretical literature. An experimental approach can also settle data disputes that result from the informal data collection techniques typically employed in theoretical linguistics, which are not well-suited to investigate the behavior of gradient linguistic data. Second, we identify a set of general properties of gradient data that seem to be valid for a wide range of syntactic phenomena and across languages. (a) Linguistic constraints are ranked, in the sense that some constraint violations lead to a greater degree of unacceptability than others. (b) Constraint violations are cumulative, i.e., the degree of unacceptability of a structure increases with the number of constraints it violates. (c) Two constraint types can be distinguished experimentally: soft constraints lead to mild unacceptability when violated, while hard constraint violations trigger serious unacceptability. (d) The hard/soft distinction can be diagnosed by testing for effects from the linguistic context; context effects only occur for soft constraints; hard constraints are immune to contextual variation. (e) The soft/hard distinction is crosslinguistically stable. In the theoretical part of the thesis, we develop a model of gradient grammaticality that borrows central concepts from Optimality Theory, a competition-based grammatical framework. We propose an extension, Linear Optimality Theory, motivated by our experimental results on constraint ranking and the cumulativity of violations. The core assumption of our model is that the relative grammaticality of a structure is determined by the weighted sum of the violations it incurs. We show that the parameters of the model (the constraint weights), can be estimated using the least square method, a standard model fitting algorithm. Furthermore, we prove that standard Optimality Theory is a special case of Linear Optimality Theory. To test the validity of Linear Optimality Theory, we use it to model data from the experimental part of the thesis, including data on extraction, gapping, and word order. For all data sets, a high model fit is obtained and it is demonstrated that the model's predictions generalize to unseen data. On a theoretical level, our modeling results show that certain properties of gradient data (the hard/soft distinction, context effects, and crosslinguistic effects) do not have to be stipulated, but follow from core assumptions of Linear Optimality Theory.

This volume, which emerged from a workshop at the "New Reflections on Grammaticalization 4" conference held at KU Leuven in July 2008, contains a collection of papers which investigate the relationship between synchronic gradience and the apparent gradualness of linguistic change, largely from the perspective of grammaticalization. In addition to versions of the papers presented at the workshop, the volume contains specially commissioned contributions, some of which offer commentaries on a subset of the other articles. The articles address a number of themes central to grammaticalization studies, such as the role of reanalysis and analogy in grammaticalization, the formal modelling of grammaticalization, and the relationship between formal and functional change, using data from a range of languages, and (in some cases) from particular electronic corpora. The volume will be of specific interest to historical linguists working on grammaticalization, and general linguists working on the interface between synchrony and diachrony.