Figure 4.

Contrast versus response gain in the model (after Reynolds & Heeger, 2009). (a) Stimulus confined to center of RF, and attention field (red filled circle) includes center and surround locations; (b) stimulus extent includes center and surround locations, while attention field is confined to the center location. In both panels, attended location weight set to 3 and unattended to 1, and number of filters is set to 2 (n = 2). The qualitative result does not depend on the number of filters.