Does Duolingo use a SRS (Spaced Repetition) method? If so how does it work?
Recently came across this site but I have a few questions. Does Duolingo use SRS Spaced Repetition System? How does this work? For instance, how does it tell which phrases/words/sentences you are poor at and what you're good at? How does it detect this? The methods I've used in the past for learning using SRS has been using flashcards however I'm interested to see how SRS works with Duolingo.
Another thing is, in terms of the tree. What's stopping you as a learner from tearing through each lesson. How does Duolingo ensure you as a learner takes the language you're learning in properly?
Thanks in advance for any answers.
Welcome to Duolingo :) Here are some sources of information you might find useful:
Have a look in the Duolingo Wiki & FAQ (unofficial, but still amazing). It's the first link you see when you go to the discussion section of Duolingo.
You could also look in the help section. There's a link to that at the bottom of each Duolingo page.
You could also look on the Duolingo Wiki.
You'll probably want to have a look at the Community and discussions guide on the Duolingo Wiki.
Good luck :)
You know, the main thing about Spaced Repetition is at the end of the day repetition.
So a rhetorical question is 'do you repeat things in Duolingo'?
Answer, yes, you will have to keep the state of your lessons 'golden'. If you do nothing, more and more of the 'golden' state is removed (e.g. from 5/5 to 4/5 to 3/5 to 2/5 to 1/5 to 0/5). So it forces you implicitly to repeat if you want to do it good.
So in that regard you have already for sure repetition.
Also things that you did not know within one lesson are usually shown again at the end of a lesson until you get it right.
Of course you can make it more optimal, e.g. offering information you do not know within an optimal time (e.g. after a few minutes, after an hour, after a week, a month, ...).
E.g. based on biological observations about what optimal times of offering information could be for humans. Typically offering it more frequently in the beginning and then later in longer and longer time intervals.
But I personally think if you keep the state golden in Duolingo you will learn it also pretty good, because you as stated are repeating the same information anyhow all the time, so probably having a similar end effect as spaced repetition anyhow or as such maybe even programmed similarly by Duolingo.
I can further formally confirm that Duolingo indeed uses spaced repetition.
This is what Luis von Ahn says (who is 'Luis' in the below post), the founder of Duolingo.
Yes, Duolingo does use a spaced repetition system for the daily practice.
Thanks for the further information. I assume that the 'daily practice' is the 'strengthen skills' button on the right hand side?
'strengthen skills' button
Yes it is.
Also in one and the same lesson you are offered the words that you typed or spoke or indicated, which were wrong again. Typically towards the end of that same lesson. And it is repeated offered to you until you have it (almost) correct.
Thanks for the comments. At what point does your tree decay? At the moment my first three lessons are all gold. When will these start to 'decay'? Do they get less and less each day when you don't 'strengthen' them?
Not sure exactly when, as it goes all via some rules programmed into the Duolingo software which I can not exactly predict either.
But that (one or more) will decay after some time (days, weeks) is for sure what is going to happen.
Further can you not really out of the box e.g. start with the e.g. last ones. They will only become available serially while you progress further. So you are kind of forced to follow the tree serially from top to bottom, lesson after lesson. You can thus not kind of random jump to whatever lesson you like, out of the box.
Only until you have done all the lessons can you re-jump to what ever lesson you want.
Welcome. Use Duolingo is my advice, it is an easy step forward to master many languages (20++) in a uniform and simple way.
As of April 11, 2018, my word list shows a total of 3031 words, of which 1573 have a strength of 1 bar. Of those weakest words, 42 were supposedly used 4 years ago - however, reading through that last I am quite certain that I have used those words much more recently. Can anyone explain when the word strength gets updated?