Hi,
If grade 2 and 3 give the same results, you're hitting the lower limit
of 'easiness' of 1.3 (The original SM2 algorithm also has this
built-in). In case you want the nitty-gritty, I paste some of the code
here. (As you'll understand by now, there is a very good reason
Mnemosyne does not show you the intervals it intends to schedule, as
there are too many corner cases which are confusing and would require
considerate in-depth explanation :-) )
Cheers,
Peter
if timing in ["LATE", "ON TIME"]:
if new_grade == 2:
card.easiness -= 0.16
if new_grade == 3:
card.easiness -= 0.14
if new_grade == 5:
card.easiness += 0.10
if card.easiness < 1.3:
card.easiness = 1.3
if card.ret_reps_since_lapse == 1:
new_interval = 6 * DAY
else:
if new_grade == 2 or new_grade == 3:
if timing in ["ON TIME", "EARLY"]:
new_interval = actual_interval * card.easiness
else:
# Learning late and interval was too long, so don't
# increase the interval and use scheduled_interval
# again as opposed to the much larger
# actual_interval * card.easiness.
new_interval = scheduled_interval
if new_grade == 4:
new_interval = actual_interval * card.easiness
if new_grade == 5:
if timing in ["EARLY"]:
# Learning ahead and interval was too short. To avoid
# that the intervals increase explosively
when learning
# ahead, take scheduled_interval as opposed to the
# much larger actual_interval * card.easiness.
new_interval = scheduled_interval
else:
new_interval = actual_interval * card.easiness
Quoting Henrik in Oslo <[email protected]>:
[Hello plugin-creator, any comments :-) ?]
Assuming the plugin predicts fairly correctly (obviously the intended
randomness distorts)
1. Previous discussion: I was reviewing *1 day* ahead of schedule. The
(adjusted) algorithm for the given examples results in the following:
- Grade 2,3,4 all gives 107 days. Grade 5 gives 47
- Grade 2,3,4 all gives 117 days. Grade 5 gives 45
- Grade 2,3,4 all gives 243 days. Grade 5 gives 98
- Grade 2,3,4 all gives 264 days. Grade 5 gives 102
a. Please explain why there is no differentiation between grades 2,3 and 4
(see also todays example)
b. Grade 5 resulting in (an adjusted) less than 50% of grade 3 is ....
surprising. Comment?
2. Today I reviewed only *todays "lesson" *(nothing ahead of time)
See attachment.
a. Examples A-F: Grading 2,3,4,5 hardly differentiates. Why?
b. Examples G-H: Grading 2 or 3 gives same result. Grading 4 or 5 also
gives practically same result (doubling result of 2,3). How come?
/ Henrik
On Tuesday, 12 November 2013 09:56:53 UTC+1, Peter Bienstman wrote:
If you're reviewing ahead of time, I made some changes to the
algorithm to prevent the intervals from growing exponentially large,
especially for grade 5. So I really recommend against using review
ahead of schedule too much.
(Also I didn't write that plugin, so I can't really vouch for its
accuracy :-) )
Peter
Quoting Henrik in Oslo <[email protected] <javascript:>>:
> I run Mnem 2.2.1 on Mac OS X10.8.5
> I've turned on the "Card Statistics" plugin and notice
>
> 1. Grades 2,3,4 hardly make a difference to Next Expected Repetition
day
> 2. Grade 5 is predicted to result in *shorter* time until repetition
than
> grade 4, 3
>
> (the attached snap-shots are taken while I was learning one day ahead of
> schedule)
>
> Any explanations?
> / Henrik
>
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