Active haptic detection and discrimination of shape
Identifieur interne : 001220 ( PascalFrancis/Corpus ); précédent : 001219; suivant : 001221Active haptic detection and discrimination of shape
Auteurs : S. Louw ; A. M. L. Kappers ; J. J. KoenderinkSource :
- Perception & psychophysics [ 0031-5117 ] ; 2002.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
In previous research, we have shown that detection thresholds for Gaussian shapes increase with a power of 1.3 of spatial width. In the present three experiments, we generalized this finding to more complex shapes and to discrimination tasks. In Experiment 1, we found that the slope of the psychometric function for detection (i.e., distinguishing curved from flat surfaces) was independent of surface shape. In Experiment 3, we found the same result for discrimination of two different curved shapes. In Experiment 2, we found that detection and discrimination functions had the same dependence on spatial width, except that discrimination thresholds were two to four times larger. Possible neural mechanisms underlying these results are discussed.
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NO : | PASCAL 03-0026442 INIST |
---|---|
ET : | Active haptic detection and discrimination of shape |
AU : | LOUW (S.); KAPPERS (A. M. L.); KOENDERINK (J. J.) |
AF : | Utrecht University/Utrecht/Pays-Bas (1 aut., 2 aut., 3 aut.) |
DT : | Publication en série; Niveau analytique |
SO : | Perception & psychophysics; ISSN 0031-5117; Coden PEPSBJ; Etats-Unis; Da. 2002; Vol. 64; No. 7; Pp. 1108-1119; Bibl. 19 ref. |
LA : | Anglais |
EA : | In previous research, we have shown that detection thresholds for Gaussian shapes increase with a power of 1.3 of spatial width. In the present three experiments, we generalized this finding to more complex shapes and to discrimination tasks. In Experiment 1, we found that the slope of the psychometric function for detection (i.e., distinguishing curved from flat surfaces) was independent of surface shape. In Experiment 3, we found the same result for discrimination of two different curved shapes. In Experiment 2, we found that detection and discrimination functions had the same dependence on spatial width, except that discrimination thresholds were two to four times larger. Possible neural mechanisms underlying these results are discussed. |
CC : | 002A26E05 |
FD : | Etude expérimentale; Sensibilité tactile; Discrimination stimulus; Seuil détection; Forme stimulus; Fonction psychométrique; Seuil différentiel; Psychophysique; Perception; Homme |
ED : | Experimental study; Tactile sensitivity; Stimulus discrimination; Detection threshold; Stimulus shape; Psychometric function; Differential threshold; Psychophysics; Perception; Human |
SD : | Estudio experimental; Sensibilidad tactil; Discriminación estímulo; Umbral detección; Forma estímulo; Funcíon psichometrica; Umbral diferencial; Psicofísica; Percepción; Hombre |
LO : | INIST-14257.354000105558380080 |
ID : | 03-0026442 |
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Pascal:03-0026442Le document en format XML
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<front><div type="abstract" xml:lang="en">In previous research, we have shown that detection thresholds for Gaussian shapes increase with a power of 1.3 of spatial width. In the present three experiments, we generalized this finding to more complex shapes and to discrimination tasks. In Experiment 1, we found that the slope of the psychometric function for detection (i.e., distinguishing curved from flat surfaces) was independent of surface shape. In Experiment 3, we found the same result for discrimination of two different curved shapes. In Experiment 2, we found that detection and discrimination functions had the same dependence on spatial width, except that discrimination thresholds were two to four times larger. Possible neural mechanisms underlying these results are discussed.</div>
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<ET>Active haptic detection and discrimination of shape</ET>
<AU>LOUW (S.); KAPPERS (A. M. L.); KOENDERINK (J. J.)</AU>
<AF>Utrecht University/Utrecht/Pays-Bas (1 aut., 2 aut., 3 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
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<LA>Anglais</LA>
<EA>In previous research, we have shown that detection thresholds for Gaussian shapes increase with a power of 1.3 of spatial width. In the present three experiments, we generalized this finding to more complex shapes and to discrimination tasks. In Experiment 1, we found that the slope of the psychometric function for detection (i.e., distinguishing curved from flat surfaces) was independent of surface shape. In Experiment 3, we found the same result for discrimination of two different curved shapes. In Experiment 2, we found that detection and discrimination functions had the same dependence on spatial width, except that discrimination thresholds were two to four times larger. Possible neural mechanisms underlying these results are discussed.</EA>
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