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First, we present an in-depth analysis of this task, highlighting the evolutionary challenges it poses and how these challenges informed our experimental design. Next, we describe the evolution of nonplastic neural circuits that can solve this food edibility learning problem. We then show that the dynamics of the best evolved nonplastic circuits instantiate finite state machines that capture the combinatorial structure of this task. Finally, we demonstrate that successful circuits with Hebbian synaptic plasticity can also be evolved, but that such circuits do not utilize their synaptic plasticity in a traditional way.<\/jats:p>","DOI":"10.1177\/1059712307084688","type":"journal-article","created":{"date-parts":[[2007,10,30]],"date-time":"2007-10-30T13:03:36Z","timestamp":1193749416000},"page":"377-396","source":"Crossref","is-referenced-by-count":24,"title":["The Dynamics of Associative Learning in Evolved Model Circuits"],"prefix":"10.1177","volume":"15","author":[{"given":"Phattanard","family":"Phattanasri","sequence":"first","affiliation":[{"name":"Department of Electrical Engineering and Computer Science, Case Western Reserve University, Cleveland, OH 44106,"}]},{"given":"Hillel J.","family":"Chiel","sequence":"additional","affiliation":[{"name":"Departments of Biology, Neurosciences, and Biomedical Engineering Case Western Reserve University Cleveland, OH 44106,"}]},{"given":"Randall D.","family":"Beer","sequence":"additional","affiliation":[{"name":"Cognitive Science Program, Department of Computer Science, Department of Informatics, Indiana University, Bloomington, IN 47406,"}]}],"member":"179","published-online":{"date-parts":[[2007,12,1]]},"reference":[{"key":"atypb1","doi-asserted-by":"publisher","DOI":"10.1038\/nature03010"},{"key":"atypb2","doi-asserted-by":"crossref","unstructured":"Baxter, D.A. & Byrne, J.H. 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