ISSN:
1432-2072
Keywords:
Apomorphine
;
Amphetamine
;
Chlordiazepoxide
;
Scopolamine
;
Phencyclidine
;
Pentobarbital
;
Morphine
;
Haloperidol
;
Chlorpromazine
;
Satiation
;
Extinction
;
Response repetition
;
Response switching
;
Pigeons
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract Using a reinforcement schedule that arranges random sequences of reinforcements over two response keys, low and high probabilities of repetition of non-reinforced responses were generated in two groups of pigeons (n=3 per group) by varying the probability of reinforcement for responding on the key to which reinforcement was assigned. Unlike rats, the pigeons did not show a tendency to repeat just-reinforced responses, but showed a strong position bias, that was reduced by additional feeding and extinction, but not by any of the drug treatments. Apomorphine increased response repetition, irrespective of the control probability of repetition; d-amphetamine increased low probabilities of repetition, but decreased high probabilities. Chlordiazepoxide and scopolamine selectively decreased high probabilities of repetition; phencyclidine and pentobarbital selectively increased low probabilities of repetition. Morphine, haloperidol, chlorpromazine, additional feeding, and extinction did not affect repetition of non-reinforced responses. Extinction increased perseveration, whereas drug effects on perseveration were not observed. Drug-induced changes of patterning of responses as exemplified herein by drug-induced alterations of repetitiveness may be relevant to the interpretation of drug effects upon performance brought about by other behavioral processes such as discrimination.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00174064
