Salience from multiple feature contrast: Evidence from saccade trajectories
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We used eye tracking to quantify the extent to which combinations of salient contrasts (orientation, luminance, and movement) influence a central salience map that guides eye movements. We found that luminance combined additively with orientation and movement, suggesting that the salience system processes luminance somewhat independently of the two other features. On the other hand, orientation and movement together influenced salience underadditively, suggesting that these two features are processed nonindependently. This pattern of results suggests that the visual system does not sum sources of salience linearly, but treats some sources of salience as redundant.
KeywordsEye movements and visual attention Visual perception
The authors thank Antonia Papadakis, Julia Gerb, and Leonie Richter for their help with data collection. Luke Tudge was supported by the Berlin School of Mind and Brain PhD scholarship.
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