NDLI: Memories and anticipations control responding by rats (Rattus norvegicus) in a Pavlovian procedure

Content Provider	Springer Nature Link
Author	Martins, Ana P. G. Miller, R. M. Capaldi, E. J.
Copyright Year	2007
Abstract	In Experiment 1 each rat received two different fixed series of three trials each. The unconditioned stimulus occurred on Trial 1 of one series and on Trial 3 of the other series, all other trials being nonreinforced. Previous Pavlovian investigations have shown that rats can remember the immediately prior reward outcome and anticipate the immediately subsequent reward outcome. Experiment 1 demonstrated that rats could remember and anticipate even more remote reward outcomes. In Experiment 2 two groups received a series of two nonrewarded trials followed by a rewarded trial. It was demonstrated that a change in the conditioned stimulus (CS) from Trial 2 to Trial 3, which occurred in one group, produced weaker responding than in the other group that did not experience such CS change. On the basis of these findings it was suggested that the rats organized the trials of a series into a unit or chunk. This was concluded for two reasons. First, remembering and anticipating remote reward outcomes strongly suggests that responding is being controlled by events extending beyond the current trial. Secondly, the experimental manipulations employed in the Pavlovian situation here are similar to those used in prior human learning and animal instrumental learning investigations concerned with chunking. Thus, it would appear that chunking is a ubiquitous phenomenon appearing in human serial learning (e.g., Bower and Winzenz 1969; Crowder 1976), in animal instrumental learning (e.g., Capaldi 1992; Hulse and Dorsky 1977; Terrace 1987), and now in Pavlovian learning.
Starting Page	59
Ending Page	66
Page Count	8
File Format	PDF
ISSN	14359448
Journal	Animal Cognition
Volume Number	11
Issue Number	1
e-ISSN	14359456
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-04-17
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Chunking Pavlovian conditioning Grouping Sequential model Human Physiology Zoology Behavioural Sciences
Content Type	Text
Resource Type	Article
Subject	Experimental and Cognitive Psychology Ecology, Evolution, Behavior and Systematics

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