title: Wide-coverage probabilistic sentence processing.
abstract: This paper describes a fully implemented, broad-coverage model of human syntactic processing. The model uses probabilistic parsing techniques, which combine phrase structure, lexical category, and limited subcategory probabilities with an incremental, left-to-right "pruning" mechanism based on cascaded Markov models. The parameters of the system are established through a uniform training algorithm, which determines maximum-likelihood estimates from a parsed corpus. The probabilistic parsing mechanism enables the system to achieve good accuracy on typical, "garden-variety" language (i.e., when tested on corpora). Furthermore, the incremental probabilistic ranking of the preferred analyses during parsing also naturally explains observed human behavior for a range of garden-path structures. We do not make strong psychological claims about the specific probabilistic mechanism discussed here, which is limited by a number of practical considerations. Rather, we argue incremental probabilistic parsing models are, in general, extremely well suited to explaining this dual nature--generally good and occasionally pathological--of human linguistic performance.
authors.affiliation: Department of Computational Linguistics, Universität des Saarlandes, Saarbücken, Germany. crocker.thorsten@coli.uni-sb.de
authors.forename: M W
authors.initials: MW
authors.lastname: Crocker
authors.forename: T
authors.initials: T
authors.lastname: Brants
mesh_terms: D003071:Cognition; D006801:Humans; D007802:Language; D008037:Linguistics; D008390:Markov Chains; D015233:Models, Statistical; D011578:Psycholinguistics / Q000706:statistics & numerical data; D013067:Speech Perception; D014825:Vocabulary