HapticV1, PubMed, Corpus, bibRecord, 001505

Visual-haptic cue weighting is independent of modality-specific attention.

Identifieur interne : 001505 ( PubMed/Corpus ); précédent : 001504; suivant : 001506

Visual-haptic cue weighting is independent of modality-specific attention.

Auteurs : Hannah B. Helbig ; Marc O. Ernst

Source :

Journal of vision [ 1534-7362 ] ; 2008.

RBID : pubmed:18318624

English descriptors

KwdEn :
- Adolescent, Adult, Attention (physiology), Discrimination (Psychology) (physiology), Female, Humans, Photic Stimulation, Sensory Thresholds (physiology), Visual Perception (physiology).
MESH :
- physiology : Attention, Discrimination (Psychology), Sensory Thresholds, Visual Perception.
- Adolescent, Adult, Female, Humans, Photic Stimulation.

Abstract

Some object properties (e.g., size, shape, and depth information) are perceived through multiple sensory modalities. Such redundant sensory information is integrated into a unified percept. The integrated estimate is a weighted average of the sensory estimates, where higher weight is attributed to the more reliable sensory signal. Here we examine whether modality-specific attention can affect multisensory integration. Selectively reducing attention in one sensory channel can reduce the relative reliability of the estimate derived from this channel and might thus alter the weighting of the sensory estimates. In the present study, observers performed unimodal (visual and haptic) and bimodal (visual-haptic) size discrimination tasks. They either performed the primary task alone or they performed a secondary task simultaneously (dual task). The secondary task consisted of a same/different judgment of rapidly presented visual letter sequences, and so might be expected to withdraw attention predominantly from the visual rather than the haptic channel. Comparing size discrimination performance in single- and dual-task conditions, we found that vision-based estimates were more affected by the secondary task than the haptics-based estimates, indicating that indeed attention to vision was more reduced than attention to haptics. This attentional manipulation, however, did not affect the cue weighting in the bimodal task. Bimodal discrimination performance was better than unimodal performance in both single- and dual-task conditions, indicating that observers still integrate visual and haptic size information in the dual-task condition, when attention is withdrawn from vision. These findings indicate that visual-haptic cue weighting is independent of modality-specific attention.

DOI: 10.1167/8.1.21
PubMed: 18318624

Links to Exploration step

pubmed:18318624

Le document en format XML

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<front><div type="abstract" xml:lang="en">Some object properties (e.g., size, shape, and depth information) are perceived through multiple sensory modalities. Such redundant sensory information is integrated into a unified percept. The integrated estimate is a weighted average of the sensory estimates, where higher weight is attributed to the more reliable sensory signal. Here we examine whether modality-specific attention can affect multisensory integration. Selectively reducing attention in one sensory channel can reduce the relative reliability of the estimate derived from this channel and might thus alter the weighting of the sensory estimates. In the present study, observers performed unimodal (visual and haptic) and bimodal (visual-haptic) size discrimination tasks. They either performed the primary task alone or they performed a secondary task simultaneously (dual task). The secondary task consisted of a same/different judgment of rapidly presented visual letter sequences, and so might be expected to withdraw attention predominantly from the visual rather than the haptic channel. Comparing size discrimination performance in single- and dual-task conditions, we found that vision-based estimates were more affected by the secondary task than the haptics-based estimates, indicating that indeed attention to vision was more reduced than attention to haptics. This attentional manipulation, however, did not affect the cue weighting in the bimodal task. Bimodal discrimination performance was better than unimodal performance in both single- and dual-task conditions, indicating that observers still integrate visual and haptic size information in the dual-task condition, when attention is withdrawn from vision. These findings indicate that visual-haptic cue weighting is independent of modality-specific attention.</div>
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<Abstract><AbstractText>Some object properties (e.g., size, shape, and depth information) are perceived through multiple sensory modalities. Such redundant sensory information is integrated into a unified percept. The integrated estimate is a weighted average of the sensory estimates, where higher weight is attributed to the more reliable sensory signal. Here we examine whether modality-specific attention can affect multisensory integration. Selectively reducing attention in one sensory channel can reduce the relative reliability of the estimate derived from this channel and might thus alter the weighting of the sensory estimates. In the present study, observers performed unimodal (visual and haptic) and bimodal (visual-haptic) size discrimination tasks. They either performed the primary task alone or they performed a secondary task simultaneously (dual task). The secondary task consisted of a same/different judgment of rapidly presented visual letter sequences, and so might be expected to withdraw attention predominantly from the visual rather than the haptic channel. Comparing size discrimination performance in single- and dual-task conditions, we found that vision-based estimates were more affected by the secondary task than the haptics-based estimates, indicating that indeed attention to vision was more reduced than attention to haptics. This attentional manipulation, however, did not affect the cue weighting in the bimodal task. Bimodal discrimination performance was better than unimodal performance in both single- and dual-task conditions, indicating that observers still integrate visual and haptic size information in the dual-task condition, when attention is withdrawn from vision. These findings indicate that visual-haptic cue weighting is independent of modality-specific attention.</AbstractText>
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Visual-haptic cue weighting is independent of modality-specific attention.

Visual-haptic cue weighting is independent of modality-specific attention.

Source :

English descriptors

Abstract

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki