{"pk":26124,"title":"A neural network model of hierarchical category development","subtitle":null,"abstract":"Object recognition and categorization is a fundamental aspectof cognition in humans and animals. Models have been imple-mented around the idea that categories are sets of frequentlyco-occurring features. Out of these models a question has beenraised, namely what is the mechanism by which we learn a hi-erarchically organized set of categories, including types andsubtypes? In this paper we introduce such a model, the Domi-nant Property Assembly Network (DPAN). DPAN uses an un-supervised neural network to model an agent which developsa hierarchy of object categories based on highly correlated ob-ject features. Initially, the network generates representations ofhigh-level object types by identifying commonly co-occurringsets of features. Over time, the network will start to use aninhibition of return (IOR) operation to examine the featuresof a categorized object that make it unusual as an instance ofits identified category. The result is a network which, earlyin training, represents classes of objects using coarse-grainedcategories and recognizes objects as members of these generalclasses, but eventually is able to recognize subtle differencesbetween subtypes of objects within the broad classes, and rep-resent objects using these more fine-grained categories.","language":"eng","license":{"name":"","short_name":"","text":null,"url":""},"keywords":[{"word":"categorization; computational modeling; proto-type theory"}],"section":"Papers","is_remote":true,"remote_url":"https://escholarship.org/uc/item/64d3p4vv","frozenauthors":[{"first_name":"Chris","middle_name":"","last_name":"Gorman","name_suffix":"","institution":"University of Otago","department":""},{"first_name":"Alistair","middle_name":"","last_name":"Knott","name_suffix":"","institution":"University of Otago","department":""}],"date_submitted":null,"date_accepted":null,"date_published":"2016-01-01T18:00:00Z","render_galley":null,"galleys":[{"label":"PDF","type":"pdf","path":"https://journalpub.escholarship.org/cognitivesciencesociety/article/26124/galley/15760/download/"}]}