Figure 1.

Predictions of attentional profile. The horizontal axis is cue-target offset, with the left most point (“same”) representing the attended feature and the right most point representing the most dissimilar feature (“most different”). Solid black line represents how attentional effect varies as a function of cue-target offset and gray dashed line depicts the baseline performance. (a) Prediction from a pure feature-similarity gain (FSG) model; (b) Prediction from a pure surround suppression model; and (c) Prediction of a hybrid model of both FSG and surround suppression at different scales. Note that the FSG induces a suppression effect at a relative larger scale while surround suppression induces a suppression effect only in the vicinity of the attended feature.