HapticV1, PubMed, Corpus, bibRecord, 001054

Attenuating the haptic horizontal-vertical curvature illusion.

Identifieur interne : 001054 ( PubMed/Corpus ); précédent : 001053; suivant : 001055

Attenuating the haptic horizontal-vertical curvature illusion.

Auteurs : Morton A. Heller ; Anne D Mcclure Walk ; Rita Schnarr ; Stephanie Kibble ; Brett Litwiller ; Cassie Ambuehl

Source :

Attention, perception & psychophysics [ 1943-393X ] ; 2010.

RBID : pubmed:20675806

English descriptors

KwdEn :
- Discrimination (Psychology), Female, Form Perception, Functional Laterality, Humans, Judgment, Male, Optical Illusions, Orientation, Psychophysics, Sensory Deprivation, Size Perception, Stereognosis.
MESH :
- Discrimination (Psychology), Female, Form Perception, Functional Laterality, Humans, Judgment, Male, Optical Illusions, Orientation, Psychophysics, Sensory Deprivation, Size Perception, Stereognosis.

Abstract

In a number of experiments, blindfolded subjects traced convex curves whose verticals were equal to their horizontal extent at the base. Overestimation of verticals, as compared with horizontals, was found, indicating the presence of a horizontal-vertical illusion with haptic curves, as well as with visible curves. Experiment 1 showed that the illusion occurred with stimuli in the frontal plane and with stimuli that were flat on the table surface in vision and touch. In the second experiment, the stimuli were rotated, and differences between vision and touch were revealed, with a stronger illusion in touch. The haptic horizontal-vertical illusion was virtually eliminated when the stimuli were bimanually touched using free exploration at the body midline, but a strong illusion was obtained when curves were felt with two index fingers or with a single hand at the midline. Bimanual exploration eliminated the illusion for smaller 2.5- through 10.2-cm stimuli, but a weakened illusion remained for the largest 12.7-cm patterns. The illusion was present when the stimuli were bimanually explored in the left and right hemispace. Thus, the benefits of bimanual exploration derived from the use of the two hands at the body midline combined with free exploration, rather than from bimanual free exploration per se. The results indicate the importance of haptic exploration at the body midline, where the body can serve as a familiar reference metric for size judgments. Alternative interpretations of the results are discussed, including the impact of movement-based heuristics as a causal factor for the illusion. It was suggested that tracing the curve's peak served to bisect the curve in haptics, because of the change in direction.

DOI: 10.3758/APP.72.6.1626
PubMed: 20675806

Links to Exploration step

pubmed:20675806

Le document en format XML

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<author><name sortKey="Walk, Anne D Mcclure" sort="Walk, Anne D Mcclure" uniqKey="Walk A" first="Anne D Mcclure" last="Walk">Anne D Mcclure Walk</name>
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<author><name sortKey="Schnarr, Rita" sort="Schnarr, Rita" uniqKey="Schnarr R" first="Rita" last="Schnarr">Rita Schnarr</name>
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<author><name sortKey="Kibble, Stephanie" sort="Kibble, Stephanie" uniqKey="Kibble S" first="Stephanie" last="Kibble">Stephanie Kibble</name>
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<author><name sortKey="Litwiller, Brett" sort="Litwiller, Brett" uniqKey="Litwiller B" first="Brett" last="Litwiller">Brett Litwiller</name>
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<front><div type="abstract" xml:lang="en">In a number of experiments, blindfolded subjects traced convex curves whose verticals were equal to their horizontal extent at the base. Overestimation of verticals, as compared with horizontals, was found, indicating the presence of a horizontal-vertical illusion with haptic curves, as well as with visible curves. Experiment 1 showed that the illusion occurred with stimuli in the frontal plane and with stimuli that were flat on the table surface in vision and touch. In the second experiment, the stimuli were rotated, and differences between vision and touch were revealed, with a stronger illusion in touch. The haptic horizontal-vertical illusion was virtually eliminated when the stimuli were bimanually touched using free exploration at the body midline, but a strong illusion was obtained when curves were felt with two index fingers or with a single hand at the midline. Bimanual exploration eliminated the illusion for smaller 2.5- through 10.2-cm stimuli, but a weakened illusion remained for the largest 12.7-cm patterns. The illusion was present when the stimuli were bimanually explored in the left and right hemispace. Thus, the benefits of bimanual exploration derived from the use of the two hands at the body midline combined with free exploration, rather than from bimanual free exploration per se. The results indicate the importance of haptic exploration at the body midline, where the body can serve as a familiar reference metric for size judgments. Alternative interpretations of the results are discussed, including the impact of movement-based heuristics as a causal factor for the illusion. It was suggested that tracing the curve's peak served to bisect the curve in haptics, because of the change in direction.</div>
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<Abstract><AbstractText>In a number of experiments, blindfolded subjects traced convex curves whose verticals were equal to their horizontal extent at the base. Overestimation of verticals, as compared with horizontals, was found, indicating the presence of a horizontal-vertical illusion with haptic curves, as well as with visible curves. Experiment 1 showed that the illusion occurred with stimuli in the frontal plane and with stimuli that were flat on the table surface in vision and touch. In the second experiment, the stimuli were rotated, and differences between vision and touch were revealed, with a stronger illusion in touch. The haptic horizontal-vertical illusion was virtually eliminated when the stimuli were bimanually touched using free exploration at the body midline, but a strong illusion was obtained when curves were felt with two index fingers or with a single hand at the midline. Bimanual exploration eliminated the illusion for smaller 2.5- through 10.2-cm stimuli, but a weakened illusion remained for the largest 12.7-cm patterns. The illusion was present when the stimuli were bimanually explored in the left and right hemispace. Thus, the benefits of bimanual exploration derived from the use of the two hands at the body midline combined with free exploration, rather than from bimanual free exploration per se. The results indicate the importance of haptic exploration at the body midline, where the body can serve as a familiar reference metric for size judgments. Alternative interpretations of the results are discussed, including the impact of movement-based heuristics as a causal factor for the illusion. It was suggested that tracing the curve's peak served to bisect the curve in haptics, because of the change in direction.</AbstractText>
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	Serveur d'exploration sur les dispositifs haptiques
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Serveur d'exploration sur les dispositifs haptiques

Attenuating the haptic horizontal-vertical curvature illusion.

Attenuating the haptic horizontal-vertical curvature illusion.

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