When to Use Which User Experience Research Methods

Gephi, an open source graph visualization and manipulation software The Mathematics of Gamification Jan 03rd At Foursquare, we maintain a database of 60 million venues. And like the world it represents, our database is ever-changing, with users from all over the world submitting updates on everything from the hours of a restaurant to the address of a new barbershop. To maintain the accuracy of our venue database, these changes are voted upon by our loyal Superusers (SUs) who vigilantly maintain a watchful eye over our data for their city or neighborhood. Like many existing crowd-sourced datasets (Quora, Stack Overflow, Amazon Reviews), we assign users points or votes based on their tenure, reputation, and the actions they take. Superusers like points and gamification. At Foursquare, we have a simple, first-principles based method of resolving proposed venue attribute updates. The Math Let’s make this more concrete with some math. Continuing, assume that after user 1 casts their vote, user 2 votes H_2 with an independent probability p_2 of being correct (i.e. agreeing with H_0).

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