Table 1. Dependency of cone weightings on Observer age.
| L COEFF | M COEFF | S COEFF | |||||||||
| ILLUM | HUE | SLOPE | R2 | p | SLOPE | R2 | p | SLOPE | R2 | p | |
| DARK | YBR | OBS | −1.57E-05 | 0.002 | 0.539 | 4.00E-05 | 0.003 | 0.426 | 2.73E-06 | 0.003 | 0.466 |
| PRED | −1.14E-04 | 0.118 | 0.000 | 7.17E-04 | 0.459 | 0.000 | 5.20E-05 | 0.501 | 0.000 | ||
| YBG | OBS | −8.34E-05 | 0.005 | 0.343 | 1.21E-04 | 0.003 | 0.435 | −9.60E-06 | 0.001 | 0.726 | |
| PRED | −1.06E-03 | 0.461 | 0.000 | 1.17E-03 | 0.256 | 0.000 | −2.16E-04 | 0.267 | 0.000 | ||
| RGY | OBS | −1.98E-04 | 0.012 | 0.138 | 4.17E-04 | 0.014 | 0.103 | 1.72E-04 | 0.011 | 0.152 | |
| PRED | −1.67E-03 | 0.475 | 0.000 | 3.24E-03 | 0.481 | 0.000 | 1.36E-03 | 0.410 | 0.000 | ||
| RGB | OBS | −5.55E-07 | 0.000 | 0.993 | 3.40E-05 | 0.001 | 0.743 | 2.66E-06 | 0.000 | 0.938 | |
| PRED | −1.09E-03 | 0.658 | 0.000 | 2.30E-03 | 0.728 | 0.000 | 6.76E-04 | 0.694 | 0.000 | ||
| DAYLIGHT (D65) | YBR | OBS | −1.15E-05 | 0.002 | 0.564 | 2.84E-05 | 0.003 | 0.447 | 1.07E-07 | 0.000 | 0.973 |
| PRED | −1.10E-04 | 0.156 | 0.000 | 7.15E-04 | 0.573 | 0.000 | 5.18E-05 | 0.594 | 0.000 | ||
| YBG | OBS | −2.46E-04 | 0.031 | 0.016* | 4.03E-04 | 0.026 | 0.028* | −6.25E-05 | 0.023 | 0.040* | |
| PRED | −1.16E-03 | 0.422 | 0.000 | 1.36E-03 | 0.238 | 0.000 | −2.37E-04 | 0.261 | 0.000 | ||
| RGY | OBS | −1.38E-04 | 0.004 | 0.379 | 2.99E-04 | 0.006 | 0.313 | 1.25E-04 | 0.003 | 0.430 | |
| PRED | −1.65E-03 | 0.388 | 0.000 | 3.17E-03 | 0.398 | 0.000 | 1.37E-03 | 0.299 | 0.000 | ||
| RGB | OBS | 4.76E-05 | 0.003 | 0.424 | −5.32E-05 | 0.001 | 0.610 | 4.27E-06 | 0.000 | 0.895 | |
| PRED | −1.05E-03 | 0.636 | 0.000 | 2.21E-03 | 0.710 | 0.000 | 6.47E-04 | 0.665 | 0.000 | ||
| COOL WHITE FLOURSECENT (CWF) | YBR | OBS | −1.94E-05 | 0.004 | 0.367 | 2.78E-05 | 0.002 | 0.577 | 2.10E-06 | 0.002 | 0.541 |
| PRED | −1.17E-04 | 0.148 | 0.000 | 7.34E-04 | 0.540 | 0.000 | 5.30E-05 | 0.556 | 0.000 | ||
| YBG | OBS | −1.73E-04 | 0.018 | 0.069 | 2.52E-04 | 0.012 | 0.138 | −3.24E-05 | 0.006 | 0.290 | |
| PRED | −1.11E-03 | 0.448 | 0.000 | 1.25E-03 | 0.243 | 0.000 | -2.32E-04 | 0.251 | 0.000 | ||
| RGY | OBS | −1.42E-04 | 0.006 | 0.299 | 2.95E-04 | 0.007 | 0.251 | 1.06E-04 | 0.004 | 0.397 | |
| PRED | −1.60E-03 | 0.443 | 0.000 | 3.10E-03 | 0.456 | 0.000 | 1.26E-03 | 0.377 | 0.000 | ||
| RGB | OBS | −4.54E-06 | 0.000 | 0.925 | 3.28E-05 | 0.001 | 0.699 | 5.64E-06 | 0.000 | 0.839 | |
| PRED | −1.04E-03 | 0.700 | 0.000 | 2.20E-03 | 0.758 | 0.000 | 6.34E-04 | 0.729 | 0.000 | ||
Slopes, coefficients of determination (R2) and the p-values for observed and predicted cone weightings (L COEFF, M COEFF, S COEFF) for all hues and all ambient illumination conditions (DARK, DAYLIGHT, COOL WHITE FLOURESCENT). Under the null hypothesis all slopes are zero, indicating no age dependency. All predicted slopes differ from zero (p<0.001; rows labelled with PRED). Observed slopes (rows labelled with OBS) are significantly different from zero (p<0.05) only for the unique green settings under D65. For all other hues and ambient illumination settings we find no age-related changes in perceived hue.