Effect of amount of original training upon onset of a 24-hour memory capacity in neonatal mice.

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Abstract
Administered 0, 10, 25, or 40 trials in a shock-escape straight alley to 128 Swiss-Webster mice (Mus musculus) when 7 or 9 days old. All groups received an additional 25 training trials 24 hrs later. During original training, both age groups improved escape performance as a function of number of training trials. However, during retention testing, only the Ss trained when 9 days old displayed differences in performance due to amount of original training. Results support earlier research suggesting that the capacity for 24-hr retention of the escape response develops between 7 and 9 days of age in mice. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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