Example of group-averaged eyeblink signal for the Auditory Conditioning session (left) and the Silent Tapping session (right). Example of a group-averaged time series of normalized event-related eyeblink signal for the Auditory Conditioning session (left) and the Silent Tapping session (right)(n = 9). Non-musicians (NM) are depicted in the upper and professional pianists (PP) in the lower panel. The red curve is the response to the target tone and the yellow curve is the response to nontarget tones. t = 0 (dashed line) refers to tone (CS) onset or keystroke, respectively. The dotted line marks the onset of the airpuff (US, at t = 400 ms), but note that only during the Auditory Conditioning the US was present. Peaks with a distance of more than standard deviation from baseline (SD curves not shown) have been labeled T (twitches) and B (blinks), followed by a number indicating the latency from event onset (e.g. "1" = 100 ms), or the relative latency from US onset (subscript US for unified nomenclature despite varying CS-US latencies). NB: (1) In the average, n(nontargets) = 4*n(target) applies. (2) In the PP Silent Tapping condition, peaks received the labels T0 and TUS0 because the majority of the individual spikes coincided with the reference time (compare Fig.2), although the peak of the averaged timeseries appears at 100 ms offset.