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- 12:04 okay so last time was encoding, today is the other half, which is, um, why we forget stuff.
- 12:19 so Ebbinghaus, 1885, he memorised lists of nonsense syllables, like three-letter things that don't mean anything, so nothing he already knew could help him
- 12:41 then he tests himself after different delays and the drop is really steep at first, and then it kind of levels off
- 13:10 that's the forgetting curve. and the practical bit, he also found spreading the practice out beats cramming it all in one go
- 13:32 which we now call the spacing effect, and that's, yeah, that's going to be on the exam
Why we forget · Lecture 7
Study notes · Standard · English
Ebbinghaus measured how quickly memory fades, and found that spacing practice out slows the loss.
The forgetting curve
- Ebbinghaus (1885) memorised lists of nonsense syllables, so prior knowledge couldn't help
- He tested his recall after different delays
- Forgetting is steep at first, then levels off
The spacing effect
- Practice spread over time beats the same practice crammed into one session
- Flagged in the lecture as exam material
Why we forget · Lecture 7
Executive summary · Brief · English
Bottom line: memory fades fast, and spacing practice out is what slows it down.
Ebbinghaus (1885) tested his recall of nonsense syllables after different delays. Most of the loss came early, then it levelled off: the forgetting curve.
He also found that spreading practice out beats cramming it into one go, now called the spacing effect. Implication: plan revision across several days, not one long session.
Why we forget · Lecture 7
Outline · Standard · English
Ebbinghaus, 1885
- Memorised nonsense syllables
- Tested recall after different delays
The forgetting curve
- Steep drop at first
- Then levels off
The spacing effect
- Spread-out practice beats cramming
- On the exam
Why we forget · Lecture 7
Q&A · Standard · English
Why did Ebbinghaus use nonsense syllables?
So nothing he already knew could help him remember them.
What shape is the forgetting curve?
A steep drop soon after learning, which then levels off.
What is the spacing effect?
Practice spread out over time is kept better than the same practice crammed into one session.
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the calvin cycle is the part that doesnt need light but it kind of depends on the light part
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The light-dependent reactions, which take place in the thylakoid membranes, are the stage where water is split and oxygen is released.
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RuBisCO fixes CO₂.
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its in the stroma where the cycle happen
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Photophosphorylation uses a proton gradient across the thylakoid membrane to synthesise ATP.
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