L·08
Learning & Memory
Sleep Is Part of the Study Session
Memory is consolidated during sleep. What you learn before sleeping survives; what you lose sleep to learn does not.
- Evidence
- proven
- Topic
- Learning
- Things to do
- 3
- Read
- 1 min
provenHow strong is the evidence?
Tested again and again, by different people, and it keeps coming out the same. You can lean on this.
- Stickgold, Nature, 2005
- Walker, Why We Sleep (2017)
- Mednick nap studies
Why it works
Slow-wave sleep transfers the day's hippocampal traces into cortex. Cutting sleep to study trades the encoding for the exposure.
What to do about it
- Review the hardest material last thing before bed.
- Never trade sleep for revision the night before. It is a straight loss on both sides.
- A 20–90 minute nap after a heavy learning block measurably helps.
Where people go wrong
The all-nighter, which reliably lowers the score it was meant to raise.
Read next
- Retrieval Beats ReviewTrying to recall something strengthens memory far more than reading it again. Rereading mostly builds confidence.proven
- SpacingThe same total study time, spread out, produces far more durable memory than massed together.proven
- Four Things, Not SevenWorking memory holds about four items. Everything past that is being dropped while you believe you are still holding it.proven
- Sleep Sets the Emotional BaselineOne night of deprivation raises amygdala reactivity to negative images by about 60% and weakens the prefrontal control over it.proven