mikelove said:
I continue to feel that adding an actual "number of cards" option to spaced repetition is a bad idea, because it can potentially result in you not reviewing any of your cards often enough to remember them. Consider this scenario: you've capped Pleco's system at reviewing 100 cards per session, but you have so many cards that you're averaging about 120 due for study every day. Of course the remaining 20 would get studied the next day, but after a week you'd have studied 700 cards but been expected to study 840, so you'd now have 140 cards that were running behind schedule, most by 1 day but some by a whole 2 days (which could already be disastrous for newly-added items).
Well, actually the problem of too many cards exists, and [mfcb] and I described a possible solution to solve it, though this is a difficult procedure. If you only cap Pleco's system reviewing 100 cards per session when 120 are due without any systematic approach (e.g. selecting from the 120 due cards 100 by the methods used with the frequency adjusted way), I agree with your answer. But when you prefer cards with a low score, the not reviewed cards are usually cards with a higher score, and it probably does not matter too much if you review cards after 60 days that are due after 50 days.
I remember a forum entry where somebody asked how to learn 500 cards with 20 cards a day. I think this is not a problem of "playing off the priority system" or "not have time to practice all of the vocabulary", but a problem how to get these 500 cards into the dayly repetition-spaced card selection within some weeks.
- If you only limit the number of unlearned cards to 20 in this case and have 80% correct answers on the first day, you will get 20 + 20% of 20 = 24 cards on day 2, and with the same assumption of 80% correct the number of cards rises steadily until day 7 (score 600 for the correct answers), when you get the 80% of 20 reviewed for the second time together with all the other cards. Of course cou can stop after 20 cards and wait for the next day, but then you have no idea what cards Pleco selected (new or old, high score or low score).
- But you could start with 20 on day 1 and review 4 old (wrong) cards and 16 new cards (instead of the limit of 20) on day 2 to 6, then 20 old cards on day 7 to 12 (16 correct from day 1 to 6 and 4 incorrect fromthe day before), then again 4 old and 16 new and so on.
This is surely just a first idea how to solve the problem, maybe not even a good one, but it is a way it could solved. If you manually without support by Pleco try to catch up, you do not want to look for the percentage of right answers to limit the number of new cards, therefore this is a typical problem to be solved by a program.
Actually there is no written help at all, and no built-in solution in Pleco, and the problem what to do after 2 weeks without repetition-spaced reviews is more difficult than starting only with new cards.
One final remark: actually with every correct answer the number of days until the next review increases and therefore the number of due cards decreases - that is the reason, why you can get 500 new cards into Pleco's repetition-spaced system with 20 cards a day, even if 20% of your answers is wrong all the time. Maybe this should be taken into account in your above example with permanently 120 due cards.