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Cross-modal cueing in audiovisual spatial attention
Steven P Blurton1,2, Mark W Greenlee3, Matthias Gondan4
1Institute for Psychology, University of Regensburg, Regensburg, Germany. steven.blurton@psy.ku.dk.
Attention, Perception & Psychophysics
|May 24, 2015
Summary
Endogenous cues facilitate audiovisual processing via a top-down, supramodal system. Exogenous cues, however, primarily influence modality-specific visual processing through bottom-up attention.
Area of Science:
- Cognitive Neuroscience
- Psychology
- Sensory Processing
Background:
- Visual attention enhances sensory processing at the focus of attention.
- Spatial cues guide visuospatial attention and affect auditory target detection.
- Cross-modal cueing effectiveness varies with visual cue type (endogenous vs. exogenous).
Purpose of the Study:
- Investigate cueing effects on audiovisual signal processing.
- Differentiate the roles of endogenous and exogenous cues in multisensory attention.
- Determine if cue-target contingencies explain differences in cueing effects.
Main Methods:
- Three experiments using endogenous and exogenous visual cues.
- Presented auditory, visual, and audiovisual targets with onset asynchrony.
- Analyzed response times and tested modality-dependency of cueing effects.
Main Results:
- Endogenous cues produced consistent cueing effects across auditory, visual, and audiovisual targets.
- Exogenous cues facilitated only visual target detection, not auditory.
- Cueing effects with endogenous cues suggest supramodal, top-down attention control.
Conclusions:
- Endogenous cues modulate multisensory perception via a unified, top-down system.
- Exogenous cues primarily influence modality-specific subsystems through bottom-up attention.
- The observed differences in cueing effects are independent of cue-target contingencies.
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