Influence of Low-Level Stimulus Features, Task Dependent Factors, and Spatial Biases on Overt Visual Attention
Figure 10
(A) Distribution of bubble positions for the expression task. (B) A single bubble based on a patch of 6 visual degrees from a full field face stimulus. The patch was filtered using an eccentricity dependent frequency filter simulating the drop of spatial acuity and a Gaussian mask to avoid edge effects. (C) Different types of bubble stimuli were generated. Stimuli of the same condition are built from patches of the same image. Stimuli of the congruent and incongruent condition are built from patches of different images of the same class or of different classes, respectively. Permuted stimuli were created for each of the three conditions by shuffling the positions of bubbles.