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ERIC Number: EJ919457
Record Type: Journal
Publication Date: 2011-May
Pages: 12
Abstractor: As Provided
Reference Count: 0
ISBN: N/A
ISSN: ISSN-0023-9690
Rats' Memory for Time and Relational Responding in the Duration-Comparison Procedure
Santi, Angelo; Hoover, Claire; Simmons, Sabrina
Learning and Motivation, v42 n2 p173-184 May 2011
Rats were trained in a duration-comparison task to press one lever if the comparison duration ("c") was 1.2-s shorter than a standard duration ("s"), and another lever if c was 1.2-s longer than s. The interval between s and c duration was 1 s. The 10 duration pairs used during training controlled for the absolute duration of "c" and the total duration of an "s-c" pair. The total duration of an "s-c" pair was not predictive of the correct response. In Experiment 1, during equal-duration pair test trials, rats increasingly responded long (i.e., "c" greater than "s") as the "s-c" delay was lengthened. In Experiment 2, long responding increased as the "s-c" delay was lengthened, even when the illumination condition during the "s-c" delay differed from that during the intertrial interval (ITI). In Experiment 3, transfer to novel duration pairs was assessed. Overall accuracy for the novel duration pairs was significantly above chance, but transfer performance was also affected by the absolute value of the novel "c" durations. This is the first study to demonstrate that rats can acquire relational duration discriminations. As in previous studies with pigeons the evidence was consistent with subjective-shortening of the standard duration and there was also evidence of a reliance on a mixture of absolute and relational strategies in responding.
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A