Visual, Haptic and Bimodal Scene Perception: Evidence for a Unitary Representation
Identifieur interne : 000388 ( Main/Merge ); précédent : 000387; suivant : 000389Visual, Haptic and Bimodal Scene Perception: Evidence for a Unitary Representation
Auteurs : Helene Intraub ; Frank Morelli ; Kristin M. GagnierSource :
- Cognition [ 0010-0277 ] ; 2015.
Abstract
Participants studied seven meaningful scene-regions bordered by removable boundaries (30 s each). In Experiment 1 (N=80) participants used visual or haptic exploration and then minutes later, reconstructed boundary position using the same or the alternate modality. Participants in all groups shifted boundary placement outward (boundary extension), but visual study yielded the greater error. Critically, this modality-specific difference in boundary extension transferred without cost in the cross-modal conditions, suggesting a functionally unitary scene representation. In Experiment 2 (N= 20), bimodal study led to boundary extension that did not differ from haptic exploration alone, suggesting that bimodal spatial memory was constrained by the more “conservative” haptic modality. In Experiment 3 (N=20), as in picture studies, boundary memory was tested 30 s after viewing each scene-region and as with pictures, boundary extension still occurred. Results suggest that scene representation is organized around an amodal spatial core that organizes bottom-up information from multiple modalities in combination with top-down expectations about the surrounding world.
Url:
DOI: 10.1016/j.cognition.2015.01.010
PubMed: 25725370
PubMed Central: 4551396
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<front><div type="abstract" xml:lang="en"><p id="P2">Participants studied seven meaningful scene-regions bordered by removable boundaries (30 s each). In Experiment 1 (N=80) participants used visual or haptic exploration and then minutes later, reconstructed boundary position using the same or the alternate modality. Participants in all groups shifted boundary placement outward (boundary extension), but visual study yielded the greater error. Critically, this modality-specific difference in boundary extension transferred without cost in the cross-modal conditions, suggesting a functionally unitary scene representation. In Experiment 2 (N= 20), bimodal study led to boundary extension that did not differ from haptic exploration alone, suggesting that bimodal spatial memory was constrained by the more “conservative” haptic modality. In Experiment 3 (N=20), as in picture studies, boundary memory was tested 30 s after viewing each scene-region and as with pictures, boundary extension still occurred. Results suggest that scene representation is organized around an amodal spatial core that organizes bottom-up information from multiple modalities in combination with top-down expectations about the surrounding world.</p>
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