[Features of conditioned alimentary instrumental reflexes in rats differing in the nature of their behavior in response to painful stimulation of conspecifics].

Groups of rats preliminary classified by their avoiding (A) or not avoiding (B) the closed space at hearing the cries of an other painfully stimulated animal (by Simonov 's method) significantly differed by parameters of an alimentary instrumental conditioned reflex. The group A, as compared to the group B, was characterized by short latencies, high afferent generalization and relative independence of latency of the alimentary reflex on the state of satiation or hunger. Such properties are supposed to be connected with individually different intensity of alimentary motivation (strong in A and weak in B) limited by a system of inborn passive defensive reactions.