Table 1. Mean amplitudes of standard- and deviant-waves for each condition and scalp position (Experiment 1).
| Monkey A | ||||
| S1500(n = 21834) | D500(n = 2219) | S500(n = 20993) | D1500(n = 2353) | |
| Fz | −2.0 (0.2) | −8.2 (0.5) | −2.6 (0.2) | −4.7 (0.5) |
| Cz | −1.2 (0.1) | −5.1 (0.5) | −1.7 (0.1) | −3.4 (0.4) |
| Pz | −0.3 (0.1) | −0.6 (0.5) | −0.8 (0.1) | −0.7 (0.4) |
| F3 | −1.7 (0.1) | −6.4 (0.5) | −2.3 (0.1) | −3.7 (0.4) |
| F4 | −1.4 (0.1) | −6.0 (0.5) | −1.9 (0.2) | −4.0 (0.4) |
| Monkey Y | ||||
| S1500 (n = 35613) | D500 (n = 3860) | S500 (n = 35378) | D1500 (n = 3797) | |
| Fz | −3.0 (0.1) | −7.6 (0.3) | −3.5 (0.1) | −7.0 (0.3) |
| Cz | −3.7 (0.1) | −7.3 (0.4) | −3.7 (0.1) | −8.9 (0.5) |
| Pz | −1.0 (0.2) | −1.0 (0.5) | −1.1 (0.2) | −1.4 (0.5) |
| F3 | −2.2 (0.1) | −4.7 (0.4) | −2.2 (0.1) | −5.0 (0.4) |
| F4 | −1.8 (0.1) | −5.1 (0.4) | −2.1 (0.1) | −3.4 (0.5) |
Note. Mean amplitudes (µV) are indicated with SE values in parentheses. S: values for standard stimuli; D: values for deviant stimuli; Subscript indicates tone frequency in Hz; number of epochs (n) are indicated in parentheses. The time windows adopted are 59–109 ms for monkey A and 61–111 ms for monkey Y (See Methods).