tailieunhanh - Báo cáo khoa học: "Acceptability Prediction by Means of Grammaticality Quantification"

We propose in this paper a method for quantifying sentence grammaticality. The approach based on Property Grammars, a constraint-based syntactic formalism, makes it possible to evaluate a grammaticality index for any kind of sentence, including ill-formed ones. We compare on a sample of sentences the grammaticality indices obtained from PG formalism and the acceptability judgements measured by means of a psycholinguistic analysis. | Acceptability Prediction by Means of Grammaticality Quantification Philippe Blache Barbara Hemforth Stephane Rauzy Laboratoire Parole Langage CNRS - Universite de Provence 29 Avenue Robert Schuman 13621 Aix-en-Provence France blache hemforth rauzy @ Abstract We propose in this paper a method for quantifying sentence grammaticality. The approach based on Property Grammars a constraint-based syntactic formalism makes it possible to evaluate a grammaticality index for any kind of sentence including ill-formed ones. We compare on a sample of sentences the grammaticality indices obtained from PG formalism and the acceptability judgements measured by means of a psycholinguistic analysis. The results show that the derived grammaticality index is a fairly good tracer of acceptability scores. 1 Introduction Syntactic formalisms make it possible to describe precisely the question of grammaticality. When a syntactic structure can be associated to a sentence according to a given grammar we can decide whether or not the sentence is grammatical. In this conception a language be it natural or not is produced or generated by a grammar by means of a specific mechanism for example derivation. However when no structure can be built nothing can be said about the input to be parsed except eventually the origin of the failure. This is a problem when dealing with non canonical inputs such as spoken language e-mails non-native speaker productions etc. From this perspective we need robust approaches that are at the same time capable of describing precisely the form of the input the source of the problem and to continue the parse. Such capabilities render it possible to arrive at a precise evaluation of the grammaticality of the input. In other words instead of deciding on the grammaticality of the input we can give an indication of its grammaticality quantified on the basis of the description of the properties of the input. This paper addresses the problem of ranking the .

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