Table 2.
Mean response amplitudes
| df | V1 | V2 | V3 | V4 | VO1 | LO1 | LO2 | V3AB | MT+ | |
|---|---|---|---|---|---|---|---|---|---|---|
| A | ||||||||||
| O1 | 7, 183 | (0.59) | (0.32) | (0.28) | (0.66) | (0.44) | (0.52) | (0.71) | (0.68) | (0.57) |
| p = 0.76 | p = 0.95 | p = 0.96 | p = 0.70 | p = 0.88 | p = 0.82 | p = 0.66 | p = 0.69 | p = 0.78 | ||
| O2 | 7, 431 | (1.38) | (0.42) | (0.18) | (0.05) | (0.44) | (0.06) | (0.33) | (0.23) | (0.26) |
| p = 0.21 | p = 0.89 | p = 0.99 | p = 0.99 | p = 0.88 | p = 0.99 | p = 0.94 | p = 0.98 | p = 0.97 | ||
| O3 | 7, 215 | (1.77) | (0.81) | (0.90) | (0.67) | (0.93) | (0.34) | (0.20) | (0.84) | (1.39) |
| p = 0.10 | p = 0.58 | p = 0.51 | p = 0.70 | p = 0.48 | p = 0.94 | p = 0.98 | p = 0.56 | p = 0.21 | ||
| O4 | 7, 239 | (1.93) | (1.68) | (1.37) | (2.25) | (1.31) | (1.10) | (0.98) | (0.82) | (3.38) |
| p = 0.07 | p = 0.11 | p = 0.22 | p = 0.03 | p = 0.25 | p = 0.37 | p = 0.45 | p = 0.57 | p = 0.00 | ||
| O5 | 7, 191 | (0.53) | (0.17) | (0.21) | (0.25) | (0.67) | (0.31) | (1.85) | (0.30) | (0.64) |
| p = 0.81 | p = 0.99 | p = 0.98 | p = 0.97 | p = 0.70 | p = 0.95 | p = 0.08 | p = 0.95 | p = 0.72 | ||
| Combined | 7, 143 | (1.45) | (0.66) | (0.27) | (0.12) | (0.18) | (0.89) | (0.68) | (1.13) | (0.25) |
| p = 0.19 | p = 0.70 | p = 0.96 | p = 0.99 | p = 0.99 | p = 0.52 | p = 0.68 | p = 0.06 | p = 0.97 | ||
| B | ||||||||||
| O1 | 0.21 | 0.11 | 0.18 | 0.13 | 0.11 | 0.11 | 0.14 | 0.14 | 0.04 | |
| O2 | 0.22 | 0.11 | 0.20 | 0.20 | 0.17 | 0.14 | 0.19 | 0.11 | 0.14 | |
| O3 | 0.16 | 0.18 | 0.10 | 0.15 | 0.15 | 0.14 | 0.15 | 0.10 | 0.18 | |
| O4 | 0.11 | 0.09 | 0.16 | 0.20 | 0.14 | 0.11 | 0.07 | 0.13 | 0.13 | |
| O5 | 0.15 | 0.14 | 0.13 | 0.10 | 0.08 | 0.07 | 0.08 | 0.08 | 0.18 | |
| Combined | 0.16 | 0.16 | 0.14 | 0.18 | 0.07 | 0.11 | 0.07 | 0.11 | 0.13 |
A, F statistics (parentheses) and p values for a one-way ANOVA analysis between the mean response amplitudes evoked by the different colors, across ROIs and observers. Significant results (p < 0.05) are shown in bold. First column represents the degrees of freedom per observer and the degrees of freedom for the combined analysis. Only in two cases (observer O4, V4, and MT+) were there significant differences between the mean response amplitudes evoked by the different colors. No significant differences were found when the data were combined across observers (bottom row). B, Decoding accuracies when attempting to classify colors on the basis of mean response amplitudes. For all areas, decoding accuracies are at or near chance, with accuracies significantly higher than chance only in a handful of observers/ROIs (two-tailed permutation test, p < 0.05, shown in bold).