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. 2021 Feb 16;44(8):zsab034. doi: 10.1093/sleep/zsab034

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© The Author(s) 2021. Published by Oxford University Press on behalf of Sleep Research Society.

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs licence (https://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reproduction and distribution of the work, in any medium, provided the original work is not altered or transformed in any way, and that the work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Figure 2. — Correlation within-subjects and between-subjects.

Figure displays the correlation between (A) the difference in percent SWS between both naps (intervention – non-intervention nap) and the difference between memory performance across the nap in percent (memory performance before sleep set to 100%). Figures (B) (intervention) and (C) (non-intervention) display the two naps separately and show the correlation between the percentage of SWS in the respective nap and memory retention across sleep (100% indicates same amount of recalled words before and after the nap).