SWA, slow-oscillation and delta power density in a short nap do not correlate with subsequent encoding performance¶

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

Subclaims¶

q2 i? Contrary to the SHY-based hypothesis, SWA power density showed no significant correlation with test performance; nor did slow oscillation or delta power. → 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 · i? · causal · r2

Pearson correlation analysis within the napping group (n = 26) between NREM frequency-band power densities (SWA 0.5–4 Hz, slow oscillation, delta) and multiple-choice performance. The article reports "no significant correlation"; equivalence was not tested and no effect size for the null is printed.

"we did notfind a significant correlation between the SWA power density and performance in the testing session (r = −0.03, p = 0.876). Neither between slow oscillations nor delta power density"

Discussion¶

Related Claims¶

• Longer NREM periods in a short nap negatively correlate with subsequent encoding performance, possibly due to sleep inertia — related
• Percentage of stage 1 sleep positively correlates with encoding performance in an exploratory analysis — related
• A short pre-lesson nap improves immediate memory encoding of a biology lesson in high-school students — related