A test for order relevance in a three-element serial learning task.
1990
Abstract Rats were trained in a straight runway on a simple three-element series of differing reward quantities. The first trial of the series ended with a two-pellet reward, and the second and third trials ended with a 12-pellet reward and a nonreward, respectively (2-12-0). All animals developed accurate anticipation of the terminal nonreward in the 2-12-0 series before it was rearranged for two test days during which the elements appeared in the order 12-2-0. The rats' anticipation of the terminal nonreward did not transfer to the reordered series, a result taken to mean that anticipation had been based upon interitem associations among memorial representations of the differing reward quantities. A second transfer test to 0-0-0, given after anticipation was reestablished to the 2-12-0 series, gave evidence that the ordinal position of the series elements was also a source of anticipation; the animals continued to run relatively slowly on the third trial in extinction. In neither transfer test was there...
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