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Author(s)
     Vlad Zotov, Douglas Mewhort
Title
      A representation shift model of classification and absolute identification.
Publication Name
     Proceedings of the 22nd Annual meeting of the International Society for Psychophysics
Publication Type
     Proceedings
Publisher
     International Society for Psychophysics
Place
      St. Albans
Editor(s)
      D. E. Kornbrot, R. M. Msetfi
Number
      & A. W. MacRae
School
     
Volume
     
Chapter
     
Pages
     
Other Publication Information
      99-104
Publication Year
     2006
Abstract
      We studied shifts of representation using production trials to measure the representation following classification and absolute identification. Identification induced a shift of representation away from the preceding exemplar. Shifts in classification depended on the category of the preceding trial. When the exemplars were from different categories, the category representation was pushed away from the preceding category. When the exemplars were from the same category, the representation of the current category was pulled from its centre in the direction of the preceding exemplar. We propose a representation shift model to account for trial-to-trial errors in both tasks. The model treats the subjectís representation of category and item structure as points in a space. The points shift dynamically from trial to trial as a function of the properties of the preceding exemplar. The RSM captures overall accuracy in both classification and absolute identification and replicates benchmark characteristics in both absolute identification and classification.
Keywords
     Categorization, identification, Judgement
Website
     http://
Paper Status
     Published
DOI / Publication ID
     



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