Speed of learning languages and repitition of answers
When I do duolingo, I memorize most of the answers when I do a lesson faster. I am not sure if this is helping me learn and understand how to use the word since most of the answers are VERY often repeated and I know the answers straight up instead of thinking about it and walking myself through it. My guess is it depends on how in-depth you want to learn the word. For this reason I question the effectiveness of duolingo. I still think duolingo is one of the easiest ways to learn a language because most language learning programs do such.
>> "I question the effectiveness of duolingo."
http://www.duolingo.com/comment/138340 ... "A study comparing the effectiveness of Duolingo to Rosetta Stone and college classes."
The short version is that about 35 hours of Duolingo was roughly equivalent to a semester of college. I think it was 55 hours for Rosetta Stone.
If you dig deep into the thread you can find the test methodology ... the same company did the comparisons but I think RS was in 2008 and DL was 2012. I know Duolingo has improved in the past year and perhaps RS has as well. Also DL was machine-timed because it was on the web while RS times were self-reported, so maybe the times spent studying are off for RS. Otherwise the methodology was similar.
This is a pretty good endorsement for the effectiveness of Duolingo. Especially since it's free while both college and Rosetta Stone will cost you several hundred dollars.
I believe that memorizing a lot of these phrases gives you a head start in conversation. I am amazed by how many things I can now say in French without having to think about them. And having a lot of complete, correct sentences float around in my head actually helps me form new, unseen ones.