Quoting
joeb...@gmail.com:
> Specifically, I have a couple of questions.
> (1) How many cards can I add per day without reaching an overload?
15 is a good estimate, that's when the warning is displayed.
> (2) Exactly how long should I have retained a card in my memory to
> consider it "memorized", that is, to be able to recall it in one or
> two days?
>
> Is there any research that suggests answers to either question?
As far as I'm concerned, this is not really 'hard' science, but much
more of a heuristic.
> My experience with the second question is rather interesting. I used
> to consider a roughly two-minute interval sufficient for considering
> a card memorized, and then realized that I couldn't remember a large
> percentage of these cards the next day. So I switched to reviewing
> unmemorized cards at least twice a day (morning and night) before
> considering them memorized, and my retention rate has shot into the
> 90 percent range.
I think you just answered your question (2) :-) I guess it also varies
a bit from person to person.
Cheers,
Peter