Splitting sleep with an afternoon nap does not impair morning learning in sleep-restricted adolescents despite reduced nocturnal sleep¶

Claim · All claims
Evidence · 1 study · causal r2 · q3 · i1 small
Currency · newest study 2019 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i1 Groups did not differ significantly for species learned in the morning (t(56) = 1.189, p = 0.239, d = 0.31); equivalence was not tested. → Cousins 2019

Evidence¶

Cousins 2019¶

Cousins, J. N., van Rijn, E., Ong, J. L., Wong, K. F., & Chee, M. W. L. (2019). Does splitting sleep improve long-term memory in chronically sleep deprived adolescents? npj Science of Learning 4:8. https://doi.org/10.1038/s41539-019-0047-z

q3 · i1 · causal · r2

In the same three-day factual knowledge experiment, "groups did not differ significantly for morning learning" on the certain-memory measure (d = 0.31, non-significant); the overall-memory morning comparison was likewise non-significant, t(56) = 1.467, p = 0.148, d = 0.39.

"while groups did not differ significantly for morning learning, t(56) = 1.189, p = 0.239, Cohen's d = 0.31."

Discussion¶

Learner Variables¶

• Sleep — predictor: learners who differ on it differ in outcomes

Related Claims¶

• Sleep schedule interacts with time of learning on confident factual memory: the split-sleep advantage appears only for afternoon-learned material — related
• A split sleep schedule raises subjective alertness and focus in the afternoon during learning, and post-nap psychomotor vigilance, in sleep-restricted adolescents — related
• Adolescents on a split sleep schedule remember more educationally realistic factual material learned in the afternoon than peers given the same total sleep opportunity as continuous nocturnal sleep — related
• Under restricted sleep, adolescents on a split sleep schedule show better late-afternoon encoding of pictures than adolescents with the same total sleep opportunity in continuous nocturnal sleep — related
• A split sleep schedule reduces 24-hour total sleep time and REM sleep duration relative to equal-duration continuous nocturnal sleep, with no consistent reduction in other sleep stages — related