Figure 9.

(A) Schematic of the neural model presented in Eq. 1, consisting of a linear filter (left) with output (right) represented by the dashed and solid lines. The solid line in the response plot represents the rectified output of Eq. 2. (B) Gabor filter consisting of 1024 weights [ripple frequency = 0.93 cyc/oct; bandwidth (σ) = 0.17 oct; 1/2 power bandwidth = 0.40 oct]. (C) Contour plot showing the response of the non-rectified filter in (B) to the 36 stimuli when implemented in the model above (A). The pattern of responding is similar to that of the neuron shown in Figures 8A–C. (D) Factorial plots showing filter response strength to each variable at each level of factor; the non-parallelism of the level functions is evidence of an interaction.