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As the participants’ instruction was to perform the required order of the left and right button presses as accurately as possible, the following types of errors were defined: a) unimanual tapping: a button press with the opposite index finger, b) bimanual synchronous and bimanual unbalanced tapping: a button press that was delayed more than 100 ms in reference to the button press of the opposite index finger, c) bimanual alternating tapping: each additional consecutive button press.
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