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A masterclass in crowdsourcing, w/Duolingo's Luis von Ahn
Masters of Scale
How to Measure the Effectiveness of a User Generated Course for Duolingo
When you reach out to users and offer to be partners with them in a shared mission, you raise the stakes. This is why louise put so much time and effort into insuring that every user generated course duolingo puts out meets his rigorous standards. To do this, he had to find a way to measure their effectiveness. But first we would measure just use ther engagement seen no average time that they spent on the corsUse ther retention so that they com the next day, et cetera. It's takin thuse years and a significant number of people with ph d to figure this out.
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