0064 Trading sleep for learning time improves next-day recall, but with poorer retention of items learned during sleep deprivation

Abstract Introduction Sleep is important for learning and memory retention. However, students often cram examinations by staying awake late to study. We tested the hypothesis that trading sleep time leads better next-day recall, but items learned during deprivation will be more poorly retained. Methods Seventy healthy adults (18–24 years; 32 males) participated in an overnight laboratory study were tasked with meanings of 120 pseudowords using digital flashcards. Half participants randomly assigned 8 h TIB (23:00 07:00) other half 4 a later bedtime (03:00 07:00). The 8-h group was given 3 sessions (17:50, 19:50, 21:50) each flashcard shown twice per session. 4-h additional 2 occurred night (23:50 01:50). Cued-recall performance tracked pre-sleep learning, following morning (09:30) on 60 selected Results Prior sleep, than (Mean score ± SD: TIB, 85.31% 20.92%; 63.76% 24.22%) because they successfully encoded new their nocturnal sessions. On morning, had significantly higher scores cued-recall test compared 83.71% 23.50%; 70.10% 24.18%; Mann-Whitney U test, p< 0.001). final session before retained (4-h 76.64%; 91.35%, Chi-squared = 20.43, Conclusion There trade-off exchanging time. More at expense resulted recall poorer newly partial deprivation. Our findings help explain why sacrifice short-term gains despite Support (if any) National Research Foundation, Singapore (NRF2016-SOL002-001)