Summary of "Relire ses Cours est une PERTE de temps (La science l'a prouvé en 1939)"

Key wellness / self-care & productivity strategies (memory & learning)

Avoid rereading or re-highlighting as your main study method; it creates an illusion of competence (familiarity feels like learning, but it isn’t reliable storage).
Use a 3-step protocol:
1. Step 1: Learn normally (read/watch/listen).
2. Step 2: Close everything and regurgitate on blank paper for 10–15 minutes (write what you remember).
3. Step 3: Reopen the source and only revise what you missed.

Without revisiting, retention drops fast:
- ~50% forgotten within 24 hours
- ~70% forgotten within 48 hours
- ~90% forgotten within a week
Each review resets the forgetting curve, so correctly-timed reviews compound retention.
Recommendation: spaced repetition over cramming.
- Instead of long rereading right before an exam, do short reviews spaced out.

Example system inspired by Letner (box method):

Sort cards into compartments:
- 1st compartment: start
- Next: review every 3 days
- Next: review every 7 days
- Last: review every 21 days
Common mistake to avoid: reviewing thoroughly once the next day, then not returning—because you’ll forget most of it within ~2 days.

Don’t study one topic completely, then the next in a rigid block.
Interleave (mix fractions/percentages/equations, for example) to force your brain to:
- distinguish what kind of problem it is,
- choose the right method,
- reduce the “I already know this” comfort of block learning.
Expect slower progress during training, but better longer-term performance.

Before learning, build genuine curiosity about what you want to know.
How to apply it:
- Browse titles/summaries before starting (book/documentary/conference).
- Write 2–3 questions you genuinely want answered.
- As you learn, capture answers + new questions to feed an “endless loop” of curiosity.

Learning continues during sleep via memory consolidation/replays.
A good night’s sleep after learning can improve later retention (~20–40%, cited).
30 minutes before bed protocol to influence consolidation:
- Do a free recovery: review something you already know you want consolidated—not new material.
- Ideally write on blank paper what you want to consolidate overnight.
- Mentally formulate a single specific question related to that topic.
- When you wake up, if possible, write down any answer (use a small notebook/pencil; avoid phone).
Core rule: protect sleep timing—sleep quality is a prerequisite for memory retention.

Presenter:

Sponsors / partners:

Researchers / scientific sources:

Herbert Spitzer (1939; rereading vs retention study)
Henry Roediger and Jeffrey Karpicke (Washington University; retrieval vs rereading experiment)
Hermann Ebbinghaus (forgetting curve)
Sebastian Leitner (Letner box/spaced repetition system)
Robert Bjork (desirable difficulties; 1979-related work)
Cheia and Morgan (interleaving vs blocked practice comparison—subtitles as “Cheia and Morgan”)
Mathias Gruber (University of California, Avis; curiosity and memory; 2014)
Matthew Walker and team (sleep and retention improvements)
Nature Neuroscience (2023 study) (hippocampus–prefrontal cortex connection during sleep)
Richard Feynman (12 questions method; deliberate curiosity practice)
Dimitri Mendeleev (sleep-inspired insight anecdote)