Q5: Does FSRS take into account the amount of time that I spend reviewing a card?
A5: No, FSRS only uses interval lengths and grades. However, the amount of time you spend on reviews is used when calculating optimal retention using the “Compute minimum recommended retention” feature.
Compute Minimum Recommended Retention
Compute minimum recommended retention
This tool will attempt to find the desired retention value that will lead to the most material learnt, in the least amount of time. The calculated number can serve as a reference when deciding what to set your desired retention to. You may wish to choose a higher desired retention if you’re willing to invest more study time to achieve it. Setting your desired retention lower than the minimum is not recommended, as it will lead to a higher workload, because of the high forgetting rate.
I see. I took time there as in cards per day, not cards per second
I might be the oddball, but my review time usually does not reflect my actual review time nor how fast i recall it for multiple reasons. CMRR might be useless for me then
If you take too long on reviews, you might want to increase your “Maximum answer seconds” in the deck options.
Also, AnkiDroid currently resets the time when editing notes. There might be other things that reset the timer and hence reduce the total review time.
In my case, theres simply no correlation, how well i knew a card and how long it took to answer
I often reflect on the cards or the context of the cards, or leave it open without answering for maximum time for example
I use the answer buttons (hard, good, easy) to gauge that. For example, I would never answer easy unless the answer came to me instantly, even if i took 30 secs to answer
This makes me wonder… If i manage to change the time of all answers to a constant (or zero), so it is the same for all cards, the CMRR would make more sense in my case, wouldnt it?
Why not tell CMRR the real information? What do you want from this feature?
That’s why it’s not taken into account in scheduling.
But it is relevant when used to consider how much time you need to spend answering cards to reach a certain retention level – which is what CMRR is targeting.
I thought it was the optimal, but i guess is just the minimal, as in, it doesnt recommend you to go lower
I see
Its just i tend to let it open and it always goes for maximum time anyway every 2 or 3 cards
My times are simply not accurate in anyway. Some times i actually researching in the middle of a card. So if that time is used in anway, that is going to be inaccurate. I think i spend sometimes 2-3 hours with a deck and the time only reflect around 1 hour
Im just trying to understand if i can use that number for something or not 
If your study-time habits are relatively consistent – consistently leaving 20-30% of your cards open for a long time, consistently studying for longer than the study time records, consistently “inconsistent” – I would think that the minimum would still be the minimum. Every day doesn’t have to look like every other though, because FSRS is looking at that study flow overall (and might even be able to see patterns where you cannot).
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If your study habits differ so fundamentally from what Anki expects, I see no problem in disregarding the timer that measures your answer times. The settings for each deck contain “Timer → Maximum Answer Seconds”, which you can set so low that all of your outliers (long reviews) will be ignored, if this is what you want. That’s exactly what it’s meant for. But with default values, this should already be fine even.
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If i hit the timer and i was actively trying to remember, thats just a mark for me to rate the card hard even if i get it completely right
Setting the timer lower is a good idea, thanks. I was not paying attention to the timer stats anyway so ill set it very low from now on just a curiosity
In my mind this was recommending the optimal %, but the more i realize its recommending the optimal minimum, the more i think that is not that useful of a number for me anyway. It only says, dont go lower than this. Im always going to want higher number
The simulator seems more useful. Etimation of cards per day im going to get. That i like
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