Feature-Binding Errors After Eye Movements and Shifts of Attention
Author(s)L'Heureux, Zara E.; Kanwisher, Nancy; Golomb, Julie D.
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When people move their eyes, the eye-centered (retinotopic) locations of objects must be updated to maintain world-centered (spatiotopic) stability. Here, we demonstrated that the attentional-updating process temporarily distorts the fundamental ability to bind object locations with their features. Subjects were simultaneously presented with four colors after a saccade—one in a precued spatiotopic target location—and were instructed to report the target’s color using a color wheel. Subjects’ reports were systematically shifted in color space toward the color of the distractor in the retinotopic location of the cue. Probabilistic modeling exposed both crude swapping errors and subtler feature mixing (as if the retinotopic color had blended into the spatiotopic percept). Additional experiments conducted without saccades revealed that the two types of errors stemmed from different attentional mechanisms (attention shifting vs. splitting). Feature mixing not only reflects a new perceptual phenomenon, but also provides novel insight into how attention is remapped across saccades.
DepartmentMassachusetts Institute of Technology. Department of Brain and Cognitive Sciences; McGovern Institute for Brain Research at MIT
Sage Publications/Association for Psychological Science
Golomb, J. D., Z. E. L’Heureux, and N. Kanwisher. “Feature-Binding Errors After Eye Movements and Shifts of Attention.” Psychological Science 25, no. 5 (March 19, 2014): 1067–1078.
Author's final manuscript