The poisoned partner effect in rats: Some parametric considerations |
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| Authors: | Nigel W Bond |
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| Institution: | 1. School of Behavioural Sciences, Macquarie University, 2113, North Ryde, N.S.W., Australia
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| Abstract: | Five experiments are reported establishing the poisoned partner effect (PPE) in rats as a robust phenomenon and indicating some of the factors that control its occurrence. Experiment 1 was a replication of Lavin, Freise, and Coombes (1980) and demonstrated that the PPE could be obtained under the conditions they described. Experiment 2 established that the PPE was not due to sensitization. Experiment 3 indicated that the nonpoisoned partner (NPP) had to be familiar with its poisoned partner in order for the PPE to be observed. Experiment 4 established that, under the conditions employed here, the NPP and its sick partner had to be paired together for at least 30 min following poisoning of the latter for the PPE to occur. Finally, Experiment 5 demonstrated that the NPP and its poisoned partner had to be paired together immediately following the poisoning episode. If 40 min or more was allowed to elapse following poisoning before the two were placed together, the PPE was attenuated. Taken together, these results indicate that the time course of the PPE is similar to that of the effects of the poisoning agent and suggest that some stimulus secreted by the poisoned rat and associated with the administration of the poison is the causative factor in the PPE. |
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