Effect of nonrewarded and partially rewarded placements on resistance to extinction in the rat

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Studied the effects of placements in the goal box on resistance to extinction of the runway response. In exp. I with 40 male royal victoria hooded rats, resistance to extinction of the runway response was more strongly related to the occurrence of nonrewarded placements followed by rewarded placements than to schedule of reward received on placements (partial reward vs. Consistent nonreward). In exp. Ii with 30 male albino holtzman rats, partially rewarded placements given separately from acquisition of the runway response were sufficient to produce a pre in the runway response. Results are interpreted within the sequential approach. (17 ref.) (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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