Document Detail

Effects of runway shift and stay rules on rats' serial pattern learning in the T-maze.
MedLine Citation:
PMID:  15825890     Owner:  NLM     Status:  MEDLINE    
Rats received three-trial series on a T-maze consisting of extended visually distinct left-black and right-striped side runways. During the first phase of training, when allowed to select baited runways within these series, they predominantly alternated their choices. During the second phase, rats received forced-choice serial pattern training of series consisting of two rewarded (R) trials and one nonrewarded (N) trial in two fixed orders, RRN and RNR. In Experiment 1, the rats in the runway shift rule group always received the second R trial when forced down a runway opposite that on the preceding trial in the series and the N trial when forced down the same runway. The rats in the runway stay rule group always received the second R trial when forced down the same runway and the N trial when forced down the opposite runway. In Experiment 2, each rat was conditionally trained with both runway outcome rules as determined by the central alley lighting and the type of food in the side alleys. The rats took longer to reduce their running speed on the N trial within each sequence under the runway stay rule than under the runway shift rule. They also took longer to acquire serial pattern responding for the RNR than for the RRN series only under the runway stay rule condition. When subsequently reexposed to series of free-choice trials on the final phase, rats maintained spontaneous alternating choice patterns under the runway shift rule conditions but either seldom alternated their choices (Experiment 1) or greatly reduced choice alternations (Experiment 2) under the runway stay rule condition. We discussed these effects in terms of rats' natural foraging strategies and as a factor that interacts with other within- and between-series variables that affect serial pattern behavior.
Jerome Cohen; Kimberly Westlake; Izabela Szelest
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Learning & behavior     Volume:  32     ISSN:  1543-4494     ISO Abbreviation:  Learn Behav     Publication Date:  2004 Nov 
Date Detail:
Created Date:  2005-04-13     Completed Date:  2005-07-08     Revised Date:  2011-01-24    
Medline Journal Info:
Nlm Unique ID:  101155056     Medline TA:  Learn Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  500-11     Citation Subset:  IM    
Department of Psychology, University of Windsor, Windsor, Ontario, Canada.
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MeSH Terms
Appetitive Behavior
Association Learning*
Choice Behavior
Discrimination Learning
Maze Learning*
Memory, Short-Term
Rats, Long-Evans
Reaction Time
Serial Learning*
Visual Perception*

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