Sleep Restriction Impairs Vocabulary Learning when Adolescents Cram for Exams: The Need for Sleep Study
Upper secondary Adults / lifelong learning Sleep and the body Foundations of optimal learning
Links to claims
Limits (1)
| Claim | Basis |
|---|---|
| C21 | OA Need-for-Sleep vocabulary RCT: 5 h vs 9 h TIB across a study week; massed recall hurt under SR, spaced protected (spacing×TIB interaction). Sleep after each study day — Bounds/spacing lead only; not applied as pre-encoding kill/survive. |
Review state: first-pass draft, pending human review.
Source note
Syntes: Huang et al. (2016) — sleep restriction hurts massed vocabulary; spaced protected
Källa: Huang, S.; Deshpande, A.; Yeo, S.-C.; Lo, J. C.; Chee, M. W. L.; Gooley, J. J. (2016). Sleep Restriction Impairs Vocabulary Learning when Adolescents Cram for Exams: The Need for Sleep Study. SLEEP 39(9), 1681–1690. https://doi.org/10.5665/sleep.6092 (PMC4989257)
Verified content
- [full text] N = 56 adolescents 15–19; 5 h vs 9 h TIB for a week at boarding school; GRE-type word pairs, spaced (across 4 days) vs massed (single sessions), total study time equated.
- [full text] Significant study-spacing × TIB interaction (LR χ² = 8.40, P < 0.01): sleep restriction lowered cued recall of massed items (Tukey P < 0.001) but not spaced items (Tukey P = 0.80) across 0 h / 24 h / 120 h retention.
- [full text] Protocol places sleep after each study day (consolidation + next-day encoding for spaced items). Authors discuss attention/effort during encoding and overnight consolidation of massed items.
Limits
- [assessment] Not a clean pre-encoding-only vs adequate-sleep contrast for C21's narrowed kill ("restricted sleep before encoding"). Spaced items survive SR — Bound lead, not a kill of the pre-encoding cost shown by Cousins 2019. Not applied as trial in extra13 (parent: second attack only if clean OA trial fits current narrowed claim).
Why it is in the library
OA Need-for-Sleep vocabulary RCT; spacing protects against multi-night SR during a study week. Future C21 Bounds / C11 spacing cross-lead.
Added 2026-10-27 by the project (extra13). [full text] = read in the full text.
Metadata as recorded
- Titel
- Sleep Restriction Impairs Vocabulary Learning when Adolescents Cram for Exams: The Need for Sleep Study
- Författare
- Sha Huang; Aadya Deshpande; Sing-Chen Yeo; June C. Lo; Michael W. L. Chee; Joshua J. Gooley
- År
- 2016
- Källa/DOI
- SLEEP 39(9):1681–1690. DOI: 10.5665/sleep.6092
- URL
- https://doi.org/10.5665/sleep.6092
- PMC
- PMC4989257
- Licens
- OA via PMC
- Typ
- experimentell RCT (parallellgrupper; TIB manipulerad)
- Åldersgrupp
- 15–19 år
- Teman
- somn-och-kropp; optimalt-larande-grunder
- Hämtad
- 2026-10-27
- ID
- SLEEP-017
- Tier
- RCT
- Obs
- 5 h vs 9 h TIB across a week of vocabulary study; massed items impaired under SR, spaced items similar between groups. Sleep follows each study day — not a clean pre-encoding-only manipulation for C21's narrowed kill.
- Köp/flagga
- OA via PMC; full text extracted from PMC HTML 2026-10-27.
The original files (PDF or abstract) are kept in the project archive and are not published here.