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By registering, you agree that you are over 18 and have read the participation policy below.

Privacy and Participation

Information such as your descriptions of clips are recorded for research purposes. However, this information is completely anonymous: we do not record any personal information such as your name or email address. The login required to enter the site is used strictly to keep track of your tags, and can bear no relation to your real name.

Policy concerning the use of human subjects in scientific research (that's you) precludes the involvement of minors without special oversight. For this reason, we ask you not to participate in this experiment if you are younger than 18 years old. Your co-operation is much appreciated.

Your participation is completely voluntary and you can discontinue your participation at any time.

Thank you for playing and have fun!

For any questions about this research, please don't hesitate to contact us at . If you have any questions on your rights as a research subject, you can contact the Columbia University Institutional Review Board at .

Michael Mandel, Major Miner and Dan Ellis, LabROSA, Columbia University