Greater sleep disruption in the present study rules out reduced sleep disruption as an explanation for the absent memory weakening¶

Claim · All claims
Evidence · 1 study · causal r1 · q3
Currency · newest study 2024 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i? The sleep fragmentation index was significantly higher in the present 1-week-delay study than in the prior 1-hour-delay study where TMR-SD weakened memories. → Nathan W. Whitmore 2024

Evidence¶

Nathan W. Whitmore 2024¶

Nathan W. Whitmore, Erika M. Yamazaki & Ken A. Paller. (2024). Targeted memory reactivation with sleep disruption does not weaken week-old memories. npj Science of Learning 9, 64. https://doi.org/10.1038/s41539-024-00276-0

q3 · i? · causal · r1

Control analysis comparing the number of awakenings or sleep-stage shifts per hour between the two studies; the null result on week-old memories cannot be attributed to less sleep disruption, since fragmentation was higher here.

"The SFI in the present study was signi ficantly greater than that reported by Whitmore and Paller 14 [t(35.94) = 3.52, p = 0.001, present study SFI = 31.6 ± 2.2, prior study SFI = 21.6 ± 1.9]."

Discussion¶

Related Claims¶

• The TMR-SD memory effect differed by post-learning delay: memory weakening occurred with a 1-hour delay but not with a 1-week delay — related
• Sleep-stage durations, sleep fragmentation, and pre- and post-cue EEG band power were not significantly correlated with forgetting of cued items or the TMR-SD effect — related
• TMR benefits on name recall are negatively correlated with post-cue sleep disruption and post-cue beta-band EEG power, suggesting reactivation depends on undisturbed sleep — related
• The TMR-SD effect did not differ for objects with low versus high pre-nap spatial error, ruling out memory strength as the explanation — related