| Abstrakt: |
Rats, hamsters, gerbils, and guinea pigs were tested on a fixed-time 1-min food-reinforcement schedule to compare schedule-induced wheel running across the four species. Four of five gerbils and three of five hamsters developed schedule-induced wheel running, whereas, only one of five rats and one of two guinea pigs displayed schedule-induced wheel running. These preliminary data extend the species generality of adjunctive wheel running, and suggest that it is a more robust phenomenon in gerbils and hamsters than in rats. |
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