In this paper we compare pronoun resolution algorithms and introduce a centering algorithm(Left-Right Centering) that adheres to the constraints and rules of centering theory and is an alternative to Brennan, Friedman, and Pollard's (1987) algorithm. We then use the Left-Right Centering algorithm to see if two psycholinguistic claims on Cf-list ranking will actually improve pronoun resolution accuracy. Our results from this investigation lead to the development of a new syntax-based ranking of the Cf-list and corpus-based evidence that contradicts the psycholinguistic claims.

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