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Dimensionally Specific Capture of Attention: Implications for Saliency Computation.
Katherine E Burnett1, Giovanni D'Avossa2, Ayelet Sapir2
1Department of Psychology, Ben-Gurion University, Beersheba 8410501, Israel.
Vision (Basel, Switzerland)
|November 19, 2019
Summary
Exogenous cues automatically guide attention. This study shows cue effects are specific to visual features, suggesting attention is not solely driven by a general saliency signal.
Area of Science:
- Cognitive Neuroscience
- Visual Attention
- Perception
Background:
- Exogenous cues automatically orient attention to environmental changes.
- This effect is often explained by a dimension-general saliency signal.
- An alternative view suggests cueing directly affects sensory responses.
Purpose of the Study:
- To investigate whether exogenous cueing effects are dimension-specific or mediated by a general saliency computation.
- To differentiate between feed-forward and feedback models of exogenous cueing.
Main Methods:
- Used a dual-task paradigm requiring motion and color discrimination.
- Employed luminance and equiluminant color cues.
- Measured the impact of cue type on target discrimination performance.
Main Results:
- Equiluminant color cues enhanced color discrimination.
- Luminance cues improved motion discrimination.
- Cue benefits were specific to the cued feature dimension.
Conclusions:
- Exogenous cueing effects are dimensionally specific.
- Findings challenge the notion that attention is solely driven by a dimension-general saliency signal.
- Suggests a more direct, feed-forward influence of cues on sensory processing.
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