Memory systems in the rat: effects of reward probability, context, and congruency between working and reference memory

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• 作者：William A. Roberts ; Nicole A. Guitar ; Heidi L. Marsh ; Hayden MacDonald
• 关键词：Working memory ; Reference memory ; Context ; Radial maze ; Rats
• 刊名：Animal Cognition
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：19
• 期：3
• 页码：593-604
• 全文大小：635 KB
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• 作者单位：William A. Roberts (1)
  Nicole A. Guitar (1)
  Heidi L. Marsh (1)
  Hayden MacDonald (1)
  
  1. Psychology Department, Western University, London, ON, N6A 5C2, Canada
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Behavioural Sciences
  Zoology
  Human Physiology
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1435-9456

文摘

The interaction of working and reference memory was studied in rats on an eight-arm radial maze. In two experiments, rats were trained to perform working memory and reference memory tasks. On working memory trials, they were allowed to enter four randomly chosen arms for reward in a study phase and then had to choose the unentered arms for reward in a test phase. On reference memory trials, they had to learn to visit the same four arms on the maze on every trial for reward. Retention was tested on working memory trials in which the interval between the study and test phase was 15 s, 15 min, or 30 min. At each retention interval, tests were performed in which the correct WM arms were either congruent or incongruent with the correct RM arms. Both experiments showed that congruency interacted with retention interval, yielding more forgetting at 30 min on incongruent trials than on congruent trials. The effect of reference memory strength on the congruency effect was examined in Experiment 1, and the effect of associating different contexts with working and reference memory on the congruency effect was studied in Experiment 2.