The tactile motion aftereffect revisited

In two experiments, we measured the direction, duration, frequency, and vividness of the tactile motion aftereffect (MAE) induced by a rotating drum with a ridged surface. In Experiment 1, we adapted the: (1) fingers and palm, including the thumb, (2) fingers and palm, excluding the thumb, and (3) fingers only, excluding the thumb. In each condition the drum rotated at 60 rpm for 120 s. There was no difference in duration, frequency, or vividness between the skin surfaces tested. In Experiment 2, we tested several adapting speeds: 15, 30, 45, 60, and 75 rpm. At each speed the fingers and palm, excluding the thumb, were adapted for 120 s. The duration, frequency, and vividness of the tactile MAE increased linearly with adapting speed. Overall, the tactile MAE was reported on approximately half of the trials, suggesting that it is not as robust as its visual counterpart.

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