title: [Probabilistic reinforcement and neurotic breakdown in unrestrained dogs].
abstract: The substitution of a constant reinforcement for a random one with a probability of 0.5 in experiments on two dogs with a simple motor stereotype was attended with nervous breakdowns with motor excitation, inadequate orienting reactions or passive-defensive behaviour. The change in the probability of reinforcement from 0.5 to 0.3 had a positive effect in experiments on one dog, while in the other it developed drowsiness. In two other dogs with a complicated stereotype, the change in the mode of reinforcement was attended with a peculiar preventive effect of probabilistic, but ordered reinforcement in experimental surroundings, including signals with a probabilistic random reinforcement as well. In this case the dogs displayed primarily signs of emotional stress only. Behaviour was somewhat disturbed in one animal only when testing signals with a probabilistic random reinforcement.
mesh_terms: D000818:Animals; D003214:Conditioning, Classical; D004195:Disease Models, Animal; D004285:Dogs; D005502:Food; D006801:Humans; D009043:Motor Activity; D009497:Neurotic Disorders; D009949:Orientation; D011336:Probability; D011930:Reaction Time; D012018:Reflex; D012054:Reinforcement, Psychology; D013016:Sound; D013997:Time Factors
vernacular_title: Veroiatnostnoe podkreplenie i nevroticheskie sryvy u sobak v usloviiakh svobodnogo povedeniia