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Actualización del algoritmo

Visión de conjunto

V4 contains an algorithm update which only increments practice intervals when questions are actually due.
You can now configure various parts of the algorithm in your user settings - we recommend you start with the Memory Default
You should not need to adjust anything, but if your current practice intervals are already far due in advance, see the Reset Practice Intervals option at the bottom of the algorithm configuration in the settings panel.
After you start learning with version 4, we don't recommend switching back to v3. We have not tested these scenarios in full and doing so may have unexpected side effects.

Si está interesado en los cambios detallados, continúe leyendo la siguiente sección.

Más detalles

Antecedentes

We found many users to be using the site in a way that was not intended by design - by over-learning questions resulting in due dates being too far into the future, effectively negating the effectiveness of spaced repetition.

Whilst you could use practice mode which serves only due questions, learn mode would allow new learners to inadvertently "over-learn" questions that they did not need to practice. Consequently, this would push questions to be due for practice far into the future.

Now, when questions are answered correctly, they are assigned a "due for practice" date, or "days next due - (DND)", or "practice interval". Previously, we would always increase the interval when a question is answered correctly, on the assumption that users would usually stop answering questions that were not due.

In brief, we aim to set the default settings to be optimal for most users, and a full understanding of the information below is not required.

¿qué ha cambiado exactamente?

V4 contains a significant update to fix this problem:

- As with more traditional spaced repetition software, "Days Next Due" for practice are now only incremeted only if questions were due (or very nearly due) at the time of answering.

There is a 4 minute window for answering due questions. If the question is due within the next 4 minutes (or any time greater), the time will be incremented. If it is due more than 4 minutes, the question will be labelled "Not Due". i.e. any questions which are due within 4 minutes or less are considered currently 'due'. The 4 minute time is configurable as a setting named "Nearly Due Time Allowance"

This stops questions from becoming due too far into the future if a user is "Over learning" (or Over studying), i.e. answering questions which are not yet due.

You can continue to study questions which are not due, but a clear warning is now shown.

If you wish to disable this behaviour and allow due counts to be incremented even if not due, you can adjust the setting "Nearly Due Time Allowance" to "Infinite".

XP points are still earned for Not-Due questions, but instead of earning 1xp, the XP earned is now 1/4 of what it would have been if it were due. The intention is to keep you focused on questions you need to learn the most.

Due counts

In V3, Due counts were calculated every hour, and questions were only considered due after answering them twice correctly. In V4, the due count is calculated as a live statistic - questions are considered due after only one correct answer and the practice interval being in the past.

We recommend you start with the initial MEMORY DEFAULT algorithm to see the effects on practice intervals.

Existing users

There should be no need to change anything, but you may wish to reset your settings for your courses.
If you have questions with practice intervals far in the future, you can use the Reset Practice Intervals option at the bottom of the algorithm configuration. This should correct your practice intervals in line with the new changes.

Algorithm Settings & Simulator

In your user settings, you can now adjust the algorithm to suit your needs. If this seems complicated, we recommend starting with the defaults and adjusting from there only if needed.

We have added an option to use an SM-2 style algorithm. This behaves very similarly to the original SM-2 formula, which may be preferred for users who use Anki.

A simulator has been added to show the effects on altering settings on the practice intervals after answering a given question correctly, incorrectly, or by skipping it.

Mastered Status changes

Higher statuses such as memorized can now only be achieved when questions are learned over a period of time.

Memorized status is now significantly harder to obtain, and can only be achieved as a result of learning questions over a long period of time.

MEMORIZED: only reached if DND ("Days Next Due") ≥ 1 month
Mastered: only reached if DND ≥ 2 weeks
Skilled: only reached if DND ≥ Now

Note: This also affects the visualisation in box mode - this is still based on consecutive answers, but consecutive answers are now only incremented for questions that were either new or due for reviewal

Skipping questions

Skipping questions will set your practice interval into the future. By default this is 4 minutes, but you can adjust it.

Skipping a question is now considered to be worse than answering a question with extremely low accuracy. It has the biggest negative impact on your practice interval.

You should only skip questions if you really don't know the answer, or simply want to ignore the card entirely. If you own the course, it makes more sense to delete the question if you frequently skip it.

For those who prefer V3

We aim to keep V3 available and ongoing for as long as possible, but we recommend to use the new system.

The closest way to emulate the previous behaviour is to set "Infinite" as the settings for "Nearly Due Time Allowance".