Table 1.
Mean P1, P1-N1, and N1P2 amplitudes in μV across subjects as a function of saliency level (high, medium, low)
| Hemi | Modality | ERP | High | Medium | Low | F(2,39) | p |
|---|---|---|---|---|---|---|---|
| Right | V | P1 | 2.98 (0.35) | 2.96 (0.33) | 2.32 (0.48) | 2.47 | < 0.11 |
| P1-N1 | −4.62 (0.71) | −4.40 (0.63) | −3.59 (0.51) | 2.15 | < 0.14 | ||
| N1-P2 | 3.97 (0.71) | 3.30 (0.69) | 2.78 (0.53) | 1.78 | NS | ||
| AV | P1 | 3.28 (0.41) | 2.77 (0.43) | 1.84 (0.42) | 10.66 | < 4.17e−4 | |
| P1-N1 | −5.58 (0.67) | −4.31 (0.63) | −3.73 (0.53) | 13.79 | < 8.28e−5 | ||
| N1-P2 | 4.32 (0.67) | 3.60 (0.57) | 3.71 (0.46) | 1.07 | NS | ||
| A + V | P1 | 2.48 (0.50) | 2.90 (0.58) | 2.52 (0.43) | 0.46 | NS | |
| P1-N1 | −5.09 (0.71) | −4.34 (0.58) | −4.43 (0.51) | 1.17 | NS | ||
| N1-P2 | 5.59 (0.67) | 4.03 (0.60) | 2.88 (0.48) | 10.85 | < 3.75e−4 | ||
| Left | V | P1 | 2.34 (0.41) | 2.45 (0.48) | 1.86 (0.40) | 2.11 | < 0.15 |
| P1-N1 | −3.31 (0.50) | −3.32 (0.41) | −2.85 (0.37) | 1.43 | NS | ||
| N1-P2 | 3.53 (0.54) | 3.21 (0.42) | 3.06 (0.37) | 0.87 | NS | ||
| AV | P1 | 2.69 (0.47) | 1.75 (0.39) | 1.28 (0.42) | 11.18 | < 3.14e−4 | |
| P1-N1 | −3.95 (0.56) | −2.89 (0.47) | −2.17 (0.34) | 10.81 | < 3.83e−4 | ||
| N1-P2 | 3.51 (0.44) | 2.95 (0.40) | 3.10 (0.40) | 0.96 | NS | ||
| A + V | P1 | 2.46 (0.38) | 3.18 (0.59) | 2.05 (0.52) | 2.63 | < 0.09 | |
| P1-N1 | −3.89 (0.49) | −3.88 (0.50) | −3.38 (0.28) | 0.55 | NS | ||
| N1-P2 | 4.87 (0.62) | 3.17 (0.41) | 2.48 (0.41) | 7.12 | < 0.004 |
Values in parentheses represent standard deviations of the group mean
Hemi hemisphere, V visual, AV audiovisual, A + V = summed unisensory response amplitudes; F = results of a 1-factor, repeated-measures ANOVA across the three salience levels