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Krasnow Institute > Monday Seminars > Abstracts ACT-R: A WORKING THEORY OF COGNITION John R. Anderson ACT-R is a unified theory of cognition which analyzes complex cognition as arising from the interactions between symbolic and subsymbolic levels of cognition. A major goal in the ACT-R theory is to get rid of all the sleights of hand that are involved in most theoretical accounts of psychological phenomena. This "no-magic" doctrine has resulted in at least four principles that we aspire to achieve in ACT-R modeling: (1) Experimental Grounding: We try to produce simulations that interact with the same experimental software that subjects interact with. (2) Attention-Limited Access: We try to model shifts of attention over the visual array and build up of an environmental model. (3) Learnable Knowledge: We try to have all the knowledge structures attributed to ACT-R be learnable through experience. (4) Principled Parameters: We try to keep parameters constant across experiments or motivate their variation. We will describe some modeling efforts that illustrate ACT-R applications and which illustrate the power of these no-magic principles.
The Krasnow Institute for Advanced Study |
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