Stumbled across this Google talk, nicely illustrating the additional information that can be obtained about data if you design your platforms in a way that engages the users to enjoy a challenge. A virtual hat tip to Luis von Ahn.
Stumbled across this Google talk, nicely illustrating the additional information that can be obtained about data if you design your platforms in a way that engages the users to enjoy a challenge. A virtual hat tip to Luis von Ahn.