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Author(s)

     Randall Jamieson, D. J. K. Mewhort

Title

     Applying an exemplar model to the serial reaction-time task: Anticipating from experience.

Publication Name

     Quarterly Journal of Experimental Psychology

Publication Type

     Journal
Publisher
     Experimental Psychology Society
Place
      Bristol, UK
Editor(s)
     
Number
     
School
     
Volume
      62
Chapter
     
Pages
      1757-1783
Other Publication Information
     
Publication Year
     2009
Abstract
      We present a serial reaction-time (SRT) task in which participants identified the location of a target by pressing a key mapped to the location. The location of successive targets was determined by the rules of a grammar, and we varied the redundancy of the grammar. Increasing both practice and the redundancy of the grammar reduced response time, but the participants were unable to describe the grammar. Such results are usually discussed as examples of implicit learning. Instead, we treat performance in terms of retrieval from a multi-trace memory. In our account, after each trial, participants store a trace comprising the current stimulus, the response associated with it, and the context provided by the immediately preceding response. When a target is presented, it is used as a prompt to retrieve the response mapped to it. As participants practice the task, the redundancy of the series helps point to the correct response and, thereby, speeds retrieval of the response. The model captured performance in the experiment and in classic SRT studies from the literature. Its success shows that the SRT task can be understood in terms of retrieval from memory without implying implicit learning.
Keywords
     implicit learning, Hick-Hyman Law, speeded performance
Website
     http://
Paper Status
     Published
DOI / Publication ID
     



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