Lexical Disambiguation Based on Distributed Representations of Context Frequency

A model for lexical disambiguation is presented that is based on combining the frequencies of past contexts of ambiguous words. The frequences are encoded in the word representations and define the words'' semantics. A simple Recurrent Network (SRN) parser combines the context frequences output. This disambiguation process is most striking when the interpretation involves semantic flipping, that is, an alternation between two opposing meanings as more words are read in. The sense of throwing a ball alternates between dance and baseball as indicators such as the agent, location, and recipient are input. The SRN parser demonstrates how the context frequencies are dynamically combined to determine the interpretation of such sentences. We hypothesize that other aspects of ambiguity resolution are based on similar mechanisms are well, and can be naturally approached from the distributed connectionist viewpoint.

[1]  Risto Miikkulainen,et al.  Natural Language Processingwith Modular Neural Networks and Distributed Lexicon , 1991 .

[2]  Walter Anthony Cook Case Grammar Theory , 1979 .

[3]  Mark S. Seidenberg,et al.  A Connectionist Modeling Approach to Word Recognition and Dyslexia , 1993 .

[4]  Risto Miikkulainen,et al.  Subsymbolic natural language processing - an integrated model of scripts, lexicon, and memory , 1993, Neural network modeling and connectionism.

[5]  Charles A. Perfetti,et al.  Lexical ambiguity and sentence comprehension , 1975 .

[6]  Michael G. Dyer,et al.  High-level Inferencing in a Connectionist Network , 1989 .

[7]  R. Schvaneveldt,et al.  Lexical ambiguity, semantic context, and visual word recognition. , 1976, Journal of experimental psychology. Human perception and performance.

[8]  D. Swinney,et al.  Accessing lexical ambiguities during sentence comprehension: Effects of frequency of meaning and contextual bias , 1981 .

[9]  Curt Burgess,et al.  Activation and selection processes in the recognition of ambiguous words. , 1985 .

[10]  Jeffrey L. Elman,et al.  Finding Structure in Time , 1990, Cogn. Sci..

[11]  Marie Bienkowski,et al.  Automatic access of the meanings of ambiguous words in context: Some limitations of knowledge-based processing , 1982, Cognitive Psychology.

[12]  Curt Burgess,et al.  Neuropsychology of Lexical Ambiguity Resolution: The Contribution of Divided Visual Field Studies , 1988 .

[13]  Trent E. Lange Lexical and Pragmatic Disambiguation and Re-Interpretation in Connectionist Networks , 1992, Int. J. Man Mach. Stud..

[14]  James L. McClelland,et al.  Learning and Applying Contextual Constraints in Sentence Comprehension , 1990, Artif. Intell..

[15]  G. Simpson Lexical ambiguity and its role in models of word recognition. , 1984, Psychological bulletin.

[16]  K. Forster,et al.  Terminating and exhaustive search in lexical access , 1976, Memory & cognition.

[17]  A. H. Kawamoto Distributed Representations of Ambiguous Words and Their Resolution in a Connectionist Network , 1988 .