Test paradigm.

<p>(A) Oddball paradigm. Tones (A and B) used for standard (s) and deviant (d) were alternated in Block 1 and Block 2. Deviant tones were randomly delivered with an appearance probability of 10%. (B) Many standards control paradigm (MSC). Tones with 10 different frequencies were presented randomly. Note that the appearance probability (10%) of each tone was identical to that of the deviants in the oddball paradigm.