Fig. 3
From: Characterization of contrast-mediated collinear interactions in the human visual system
Results obtained in Experiment 2. The spatial frequency of the Gabor patches was 12 CPD. For a target-flankers distance of 1.5λ, facilitation was observed for low levels of flanker contrast. These results extend the predictions of the Zenger & Sagi21 model to a different configuration (oblique) and spatial frequency. As in the previous experiment, as flanker contrast increases, facilitation transitions to inhibition. For a target-flankers distance of 3λ, facilitation increases with flanker contrast, apparently reaching a plateau. In the figure, Cm represents the contrast of the flankers, while Cth indicates the contrast threshold in the baseline condition (i.e., the threshold for detecting the target stimulus without flankers).
