I wonder if the subjects knew the device should vibrate, so if it didn't vibrate at all it would have thrown off the test. If not, I agree with you. Or just fi

I wonder if the subjects knew the device should vibrate, so if it didn't vibrate at all it would have thrown off the test. If not, I agree with you. Or just find subjects that don't know what the devices do so they can just sit on their heads doing nothing.