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ERIC Number: EJ848303
Record Type: Journal
Publication Date: 2004
Pages: 21
Abstractor: As Provided
Reference Count: 20
ISSN: ISSN-0211-2159
Retardation and Summation Tests after Extinction: The Role of Familiarity and Generalization Decrement
Lopez, Matias; Cantora, Raul; Aguado, Luis
Psicologica: International Journal of Methodology and Experimental Psychology, v25 n1 p45-65 2004
In four conditioned taste aversion experiments with rats as subjects, the effects of extinguished or pre-exposed flavors on retardation and summation tests was compared. Experiment 1 showed that when steps were taken to ensure similar exposure to the target flavor in all conditions, acquisition after pre-exposure and reacquisition after extinction proceeded at a similar rate and was slower than acquisition in a new stimulus control condition. In Experiment 2, reacquisition occurring 2 days after extinction was again slower than acquisition to a new stimulus, but this retardation disappeared when extinction and reacquisition were separated by a 21 days interval. Experiment 3 showed that both an extinguished and a pre-exposed flavor produced a similar summation effect, attenuating the aversion to a previously conditioned flavor. Finally, Experiment 4 showed that this attenuation was also produced by a new flavor. These results suggest, first, that retarded acquisition after extinction of a conditioned taste aversion might be the result of latent inhibition produced by extended experience with the flavor during extinction and, second, that attenuation of aversion to a test excitor on a summation test might not reflect any specific learning process but be simply due to stimulus generalization decrement. (Contains 4 tables and 4 figures.)
University of Valencia. Dept. Metodologia, Facultad de Psicologia, Avda. Blasco Ibanez 21, 46010 Valencia, Spain. Tel: +34-96-386-4100; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A