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. Author manuscript; available in PMC: 2007 Sep 27.
Published in final edited form as: Vision Res. 2006 Oct 31;47(1):85–107. doi: 10.1016/j.visres.2006.09.005

Table 3.

Comparison of Model Fits

Model Single RF Single RF Square 25* Square 49 Square 169 Square 169
Small Patterns m=2.9 m=2.9 m=2.9 m=2.49 m=3.08
Number RF's 1 1 25 49 169 169
Layout square square square square
Spacing of RF's (wl.) 2 1 0.5 0.5
Size of array (wl.) 0 0 6×6 6×6 6×6 6×6
Parameter Values & RMSE HHH only JMF only
Circular RF Model
 S0 2210 3405 3147 3282 3646 5838 2144
 σ (deg) 0.157 0.101 0.102 0.089 0.067 0.051 0.077
 m 1 1 2.9 2.9 2.9 2.49 3.08
 RMSE 1.86 1.30 1.14 1.05 0.99 0.87 1.04
Elliptical RF Model
 S0 2232 3449 3160 3303 3695 6070 2085
 σx (deg) 0.136 0.092 0.093 0.082 0.060 0.048 0.065
 σy (deg) 0.186 0.111 0.112 0.097 0.075 0.053 0.095
 m 1 1 2.9 2.9 2.9 2.49 3.08
 Ratio: σy/σx 1.37 1.20 1.20 1.19 1.25 1.09 1.47
 RMSE 1.78 1.04 1.04 0.95 0.89 0.81 0.89
*

Note: In this model alternate rows and columns of RF centers were offset by one wavelength. Within each row and column centers were separated by 2 wavelengths.