Fig. 2
From: Characterization of contrast-mediated collinear interactions in the human visual system
Results obtained in Experiment 1. The spatial frequency of the Gabor patches was 1 CPD. For a target-flankers distance of 2λ, facilitation was observed for low levels of flanker contrast, as predicted by the Zenger & Sagi model21. However, as flanker contrast increases, facilitation transitions to inhibition. For a target-flankers distance of 4λ, 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).
