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Titolo:
The role of eye height in perceiving affordances and object dimensions
Autore:
Wraga, M;
Indirizzi:
Emory Univ, Atlanta, GA 30322 USA Emory Univ Atlanta GA USA 30322Emory Univ, Atlanta, GA 30322 USA
Titolo Testata:
PERCEPTION & PSYCHOPHYSICS
fascicolo: 3, volume: 61, anno: 1999,
pagine: 490 - 507
SICI:
0031-5117(199904)61:3<490:TROEHI>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
SCALED INFORMATION; VISUAL GUIDANCE; HORIZON-RATIO; LEVEL; DYNAMICS; FIELD; SIZE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Wraga, M Harvarde,niv, Dept Psychol, 33 Kirkland St,William James Hall 840, Cambridg Harvard Univ 33 Kirkland St,William James Hall 840 Cambridge MA USA 02138
Citazione:
M. Wraga, "The role of eye height in perceiving affordances and object dimensions", PERC PSYCH, 61(3), 1999, pp. 490-507

Abstract

In four experiments on perceived object height and width, the effects of shifting participants' effective eye height (EEH) on affordance (intrinsic) and apparent size (extrinsic) judgments were contrasted. In Experiment 1, EEH shifts produced comparable overestimations of height in intrinsic and extrinsic tasks. A similar result was found with a more abstract extrinsic height task (Experiment 2). However, Experiment 3 revealed a dissociation between intrinsic and extrinsic tasks of perceived width. Affordance judgmentswere affected by EEH shifts, whereas apparent size judgments were not. Experiment 4 compared participants' performance on comparable extrinsic tasks of height and width. Height judgments were affected by EEH shifts, but width judgments were again unaffected. It is concluded that eye height may be amore natural metric for object height than for width. Moreover, this difference reflects a basic flexibility within the human visual system for selectively attuning to the most accessible sources of size information.

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Documento generato il 25/09/20 alle ore 10:20:28