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. 2016 Jul;23(7):339–348. doi: 10.1101/lm.042069.116

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© 2016 Johnson et al.; Published by Cold Spring Harbor Laboratory Press

This article is distributed exclusively by Cold Spring Harbor Laboratory Press for the first 12 months after the full-issue publication date (see http://learnmem.cshlp.org/site/misc/terms.xhtml). After 12 months, it is available under a Creative Commons License (Attribution-NonCommercial 4.0 International), as described at http://creativecommons.org/licenses/by-nc/4.0/.

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Figure 4. — Better spatial memory is not associated with better spatial discrimination abilities in young or aged rats. SLI values and percent correct responses on 48-cm trials were normalized and correlations were computed separately for young and aged groups. (A) In the young group, a statistical trend toward a positive correlation indicated young rats with better spatial memory (i.e., lower SLI values) were more likely to have poor spatial discrimination abilities (i.e., fewer correct responses on 48-cm trials) (R = 0.613, P = 0.06). (B) In the aged group, SLI values and discrimination performance on 48-cm trials were not significantly correlated (R = −0.305, P = 0.43). (C) Individual rats’ performance on 48-cm trials during tests for spatial discrimination abilities. Horizontal bars indicate group means. Two of the nine aged rats showed superior discrimination abilities on these trials (i.e., 73.3% correct responses). Performance of these two rats was above the normative range of both young and aged groups (young Mean = 64.2%, SD = 8.1, Mean + 1SD = 72.3%; aged Mean = 55.8%, SD = 12.1, Mean + 1SD = 67.9%). Scatterplots show best fit line ± 95% confidence intervals.