Can someone explain how/why the study plan differs between people?
My boyfriend and I decided to start learning German together using Duolingo. I did German in high school, but remember very very little, while he has never studied it.
Apart from the structure, the number of lessons in some skills differs (9 food lessons for me, 6 for him; 4 vs. 3 in animals), with me tending to have more and I therefore have a larger vocabulary.
I haven't been able to find any information on how/why Duolingo tailors the study plans on an individual basis, but we are both curious.
Can anyone shed some light?
My guess: I think they are simply testing different approaches to see what plan works best. I doubt it is 'tailored' as much as a blind study. They need data to show that their system works, and they tinker with it to make it better. If, after a a few weeks, you have made much better progress than your bf -- apart from simply being much smarter ;) -- Duo could put everyone on the plan you used.