{"pk":32053,"title":"Emergent Letter Perception: Implementing the Role Hypothesis","subtitle":null,"abstract":"Empirical psychological experimentation (very briefly reviewed here) has provided evidence of top-down conceptual constraints on letter perception. The role hypothesis suggests that these conceptual constraints take the form of structural subcomponents (roles) and relations between subcomponents (r-roles). In this paper, we present a fully-implemented computer model based on the role hypothesis of letter recognition. The emergent model of letter perception discussed below offers a cogent explanation of human letter-perception data — especially with regard to error-making. The model goes beyond simple categorization by parsing a letter-form into its constituent parts. As it runs, the model dynamically builds (and destroys) a context-sensitive internal representation of the letter that it is perceiving. The representation emerges as by-product of a parallel exploration of possible categories. The model is able to successfully recognize (i.e., conceptually parse) many diverse letters at the extremes of their categories.","language":"eng","license":{"name":"","short_name":"","text":null,"url":""},"keywords":[],"section":"Posters","is_remote":true,"remote_url":"https://escholarship.org/uc/item/31w4j195","frozenauthors":[{"first_name":"Gary","middle_name":"","last_name":"McGraw","name_suffix":"","institution":"Reliable Software Technologies Corporation","department":""},{"first_name":"Douglas","middle_name":"R.","last_name":"Hofstadter","name_suffix":"","institution":"Center for Research on Concepts and Cognition","department":""}],"date_submitted":null,"date_accepted":null,"date_published":"1996-01-01T18:00:00Z","render_galley":null,"galleys":[{"label":"PDF","type":"pdf","path":"https://journalpub.escholarship.org/cognitivesciencesociety/article/32053/galley/23118/download/"}]}