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#html:false
#notetype:Basic
#deck:Math::Learning to learn::Spaced retrieval
#tags:learning memory
#columns:Front	Back	Tags
#tags column:3
Who first measured the forgetting curve, and when?	Hermann Ebbinghaus, 1885.	memory
A common model of the forgetting curve?	R = e^(-t/S): recall chance after t days, with S the stability.	memory
What is the testing effect?	Retrieving from memory strengthens it more than rereading for the same time.	memory
What is the spacing effect?	The same number of reviews works better spread out than crammed together.	memory
Why does cramming feel productive?	Every rereading succeeds, because the memory has not faded; that is also why it strengthens little.	trap
SM-2 review gaps?	1 day, 6 days, then each gap 2.5 times the last, rounded up.	schedule
How many reviews to keep a card for T days on a geometric schedule?	About log(T) / log(2.5): it grows with the logarithm of T.	schedule
SM-2 reviews to keep a card one year? Ten years?	6 and 9. A weekly review would take 53 and 522.	schedule
McGuire's five-step study cycle?	Preview, attend, review, study (intense study sessions), assess.	study-cycle
The four parts of an intense study session?	Set a goal (1-2 min), study with focus (30-50 min), break or reward (10-15 min), review (5 min).	study-cycle
When should the review step of the study cycle happen?	As soon as possible after class.	study-cycle