Neuroscience · Level 2 · Intermediate
Splitting sleep between the night and a daytime nap reduces homeostatic sleep pressure and enhances long-term memory
Cousins JN, Leong RLF, Jamaluddin SA, et al. (2021). Scientific Reports. doi:10.1038/s41598-021-84625-8 · CC BY 4.0
Step 1 of 2Read the paper
Teenagers at a boarding-school camp lived through two simulated school weeks with either 6.5 or 8 hours of sleep opportunity per day, taken all at night or split into a shorter night plus a 90-minute afternoon nap. The researchers tested memory for pictures and for facts about amphibians, and recorded sleep with EEG to estimate sleep pressure.
How to read it
- Study Figure 1 first: it maps out the baseline, manipulation and recovery days and when each memory task happened.
- In Methods > Procedure, note the exact bed and nap times for each of the four groups.
- Figure 3 holds the key memory results; compare split vs continuous bars for morning and afternoon.
- Read the Discussion paragraphs on mechanisms and practical challenges for the authors' own caveats.
Step 2 of 2Take the test
15 questions · about 40 minutes including reading · pick an answer to see straight away if it’s right. Nothing is saved.
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Paper: Cousins JN, Leong RLF, Jamaluddin SA, et al., Scientific Reports (2021), licensed CC BY 4.0. Summary and questions are Research Nest’s own; read the original for the full study.