Table 4.
Infants: mean (1SD) baseline-to-peak amplitude and peak latency measurements for individual components of the waveform elicited to the S1 and S2 portion of the /dada/, /daba/, and /daDa/ stimulus conditions are shown. The latencies were measured from the onset of the S1 stimulus and from the onset of the change in the stimulus at S2. Mean (1SD) N1-P2 amplitudes are also indicated. Mean values that represent measurements from fewer than five responses are denoted with an asterisk (∗). The dashed line indicates that no responses were detected. The terms “BP” and “BN” denoted “broad positive” and “broad negative” peaks, respectively.
| Peak | Mean amplitude in µV (1SD) | Mean peak latency in ms (1SD) | |||||
|---|---|---|---|---|---|---|---|
| /dada/ | /daba/ | /daDa/ | /dada/ | /daba/ | /daDa/ | ||
| S1 | P1 | 5.25 (1.69) | 6.69 (4.22) | 6.19 (2.85) | 133 (27) | 139 (20) | 124 (15) |
| N1 | −8.03 (4.48) | −9.13 (4.36) | −9.30 (3.69) | 225 (16) | 230 (24) | 222 (28) | |
| P2 | 7.46 (3.46) | 5.61 (2.67) | 6.56 (4.04) | 313 (14) | 319 (29) | 328 (55) | |
| N2 | −5.81 (4.02) | −7.12 (2.37) | −3.37 (2.88) | 430 (25) | 432 (57) | 384 (44) | |
| N1-P2 | 14.49 (6.77) | 14.04 (3.64) | 15.86 (6.21) | ||||
|
| |||||||
| S2 | P1 | 3.99 (1.48) | 7.81 (3.00) | 9.62 (1.63) | 136 (25) | 134 (36) | 142 (63) |
| N1 | −6.60 (3.22) | −10.05 (6.99) | −7.46 (3.62) | 259 (48) | 285 (58) | 296 (31) | |
| P2 | 7.97 (5.43) | 4.26∗ (2.58) | 6.00∗ (5.08) | 448 (69) | 391∗ (97) | 421∗ (34) | |
| N2 | −4.28∗ (1.14) | −4.09∗ (3.92) | −3.71∗ | 584∗ (206) | 492∗ (124) | 563∗ | |
| BP | — | 4.81∗ | 6.35∗ (1.24) | — | 577∗ | 518∗ (32) | |
| BN | −4.92∗ (0.94) | −10.09∗ | −5.69∗ (1.05) | 537∗ (159) | 319∗ | 587∗ (26) | |
| N1-P2 | 14.57 (5.48) | 13.69 (8.27) | 17.50∗ (10.54) | ||||