Figure 1.

Prototypical visual display and corresponding auditory stimulation. Each trial started with the display of a visual pattern. After 1 s a corresponding sound pattern was presented either congruent to the visual pattern in all elements (congruent trial) or deviating in a single element (incongruent trial). Sound duration was 300 ms. Stimulus onset asynchrony was 600 ms. Three hundred milliseconds after the offset of the last sound a question mark was overlayed indicating the subject to discriminate congruent and incongruent trials by button press.