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The ventriloquist effect does not depend on the direction of automatic visual attention.
J Vroomen1, P Bertelson, B de Gelder
1Department of Psychology, Tilburg University, P. O. Box 90153, 5000 LE Tilburg, The Netherlands. j.vroomen@kub.nl
Perception & Psychophysics
|July 5, 2001
Summary
The ventriloquism effect, or visual bias of sound location, is not influenced by automatic, or exogenous, attention. Sound localization shifts away from visual singletons, indicating sensory interactions rather than attentional control.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Auditory Perception
Background:
- The ventriloquism effect, a visual bias in auditory sound localization, was previously found to be independent of deliberate (endogenous) attention.
- The role of automatic (exogenous) attention in this phenomenon remained unexamined.
Purpose of the Study:
- To investigate whether exogenous attention influences the ventriloquism effect.
- To determine if visual spatial attention plays a role in auditory localization biases.
Main Methods:
- Utilized a visual display with a unique 'singleton' square to attract exogenous attention.
- Presented auditory sound bursts and asked participants to judge their location.
- Included tasks to confirm singleton-driven exogenous attention shifts.
- Mixed localization and discrimination tasks to control for participant strategies.
Main Results:
- Auditory sound location was attracted towards larger squares opposite the singleton, not the singleton itself.
- Exogenous attention was indeed drawn to the singleton, as evidenced by impaired performance on targets near it.
- Despite singleton-driven attention, sound localization shifted away from the singleton.
Conclusions:
- The ventriloquism effect can be dissociated from exogenous visual attention.
- Auditory localization biases appear to result from sensory interactions, with minimal involvement of visual spatial attention direction.