Instructions: the sketch below will appear one stroke at a time. Keep clicking the 'DRAW MORE' button to see more of the sketch. Once you think you know what the sketch is, enter your guess in the blank, and click 'GUESS'. You can submit the HIT when either you've guessed correctly or when the sketch is complete.

Enter your guess for the sketch:

Don't know what it is?

By playing this game, you are participating in a study being performed by cognitive scientists in the MIT Computer Science and Artificial Intelligence Lab. If you have questions about this resarch, please contact Dr. Oliva at oliva@mit.edu. Your participation in this research is voluntary. You may decline further participation, at any time, without adverse consequences. Your anonymity is assured; the researchers who have requested your participation will not receive any personal information about you.