Abstract

This chapter presents a new model of coreferential NP anaphora processing, JANUS, within the mental models framework. It summarises previous research on NP anaphora that is most pertinent to JANUS, and outlines two previous attempts to provide an integrated theory of NP anaphora: Centering Theory and Almor’s Informational Load Hypothesis. Each has it problems, but the Informational Load Hypothesis is more firmly rooted in psychology, and closer to our own approach. JANUS incorporates many ideas from the Informational Load Hypothesis, but attempts to address its problems. JANUS assumes that the semantic content of an anaphor should be justified by two types of role that the anaphoric expression plays. Backward-looking roles are primarily concerned with identifying the antecedent (and referent) of the anaphor. Forward-looking roles relate to what is to be said about the referent in upcoming discourse. These two types of roles give JANUS its name.