Using the WebCAPE test for Spanish, a placement test many universities also use for their students, the study found that the average student gained around 91 points over the course of eight weeks and the average participant gained about 8 points per hour of study with Duolingo, though its worth noting that the researchers also found that Duolingo was a little bit more effective for students who started with a very basic knowledge of Spanish than for those who were already more advanced. While the study was obviously funded by Duolingo, the data collection and analysis was done independently by the researchers. These studies were conducted by Roumen Vesselinov, a Visiting Assistant Professor at Queens College, City University of New York, and John Grego, Professor and Chair of the Statistics Department and the University of South Carolina. The result, which even surprised von Ahn: it only takes a Duolingo user 34 hours to learn the equivalent of a first college semester’s worth of Spanish.Ī similar study by the same researchers who conducted Duolingo’s study, by the way, found that it took Rosetta Stone users between 55 and 60 hours to learn the same amount of material. To see how its program performed, the language learning service Duolingo, founded by CAPTCHA inventor Luis von Ahn, commissioned a study ( PDF) into the effectiveness of its program. Education is quickly moving online, but we haven’t seen all that many studies that actually look into the effectiveness of these new forms of online learning.
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