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Course of the psychometric somatosensory testing and training procedure. Using a torque motor‐driving device (left), two bursts of tactile stimuli were presented after an auditory cue with the second burst differing from the first in 50% of trials (right). Subjects responded in a two‐alternative forced‐choice fashion with “equal” or “different.” (Modified from Knecht et al. [1996b]).
