Percentage of stage 1 sleep positively correlates with encoding performance in an exploratory analysis¶

Claim · All claims
Evidence · 1 study · causal r2 · q2 · i3 large
Currency · newest study 2025 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i3 In an exploratory analysis, the percentage of S1 sleep correlated positively with multiple-choice test performance (r = 0.42, p = 0.030). → Vidal 2025

Evidence¶

Vidal 2025¶

Vidal, V., Pretel, M. R., Capurro, L., Tassone, L. M., Moyano, M. D., Malacari, R. G., Brusco, L. I., Ballarini, F. M. & Forcato, C. (2025). Short naps improve subsequent learning in a high school setting. npj Science of Learning 10:15. https://doi.org/10.1038/s41539-025-00307-4

q2 · i3 · causal · r2

Exploratory Pearson correlation in the napping group (n = 26) between percentage of stage 1 sleep and test score, printing "r = 0.42, p = 0.030". Alpha and theta power in S1 showed no significant correlation with performance.

"we found a significant positive correlation between the percentage of S1 and performance on the multiple-choice test (Fig. 2c, r = 0.42, p = 0.030)"

Discussion¶

Related Claims¶

• Longer NREM periods in a short nap negatively correlate with subsequent encoding performance, possibly due to sleep inertia — related
• SWA, slow-oscillation and delta power density in a short nap do not correlate with subsequent encoding performance — related
• Sleep stage duration and architecture show no significant correlation with memory change in this nap paradigm — related
• A short pre-lesson nap improves immediate memory encoding of a biology lesson in high-school students — related