Directions

The subject will receive two sequential vibrations - one to each finger - of unequal duration. Determine which of the vibrations lasted longer, and click on the corresponding box on the computer screen*. 

Testing Notes

Response time is not important for this test. It may feel as though the two vibrations are of equal duration. If you cannot detect a difference in duration, make the best guess possible. This test is identical to the Duration Challenge, but with an accompanying background vibration (confound).

*When SwiftClick (hardware response) is enabled, you may respond to each question by depressing the corresponding stimulus tip.