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Titolo:
Mapping the zone of eye-height utility for seated and standing observers
Autore:
Wraga, M; Proffitt, DR;
Indirizzi:
Univ Virginia, Dept Psychol, Charlottesville, VA 22903 USA Univ Virginia Charlottesville VA USA 22903 Charlottesville, VA 22903 USA
Titolo Testata:
PERCEPTION
fascicolo: 11, volume: 29, anno: 2000,
pagine: 1361 - 1383
SICI:
0301-0066(2000)29:11<1361:MTZOEU>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
SCALED INFORMATION; AFFORDANCES; PERCEPTION; LEVEL; DISTANCE; OBJECTS; PITCH; SIZE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Wraga, M Smith Coll, Dept Psychol, Northampton, MA 01063 USA Smith Coll Northampton MA USA 01063 l, Northampton, MA 01063 USA
Citazione:
M. Wraga e D.R. Proffitt, "Mapping the zone of eye-height utility for seated and standing observers", PERCEPTION, 29(11), 2000, pp. 1361-1383

Abstract

In a series of experiments, we delimited a region within the vertical axisof space in which eye height (EH) information is used maximally to scale object heights, referred to as the "zone of eye height utility" (Wraga, 1999b Journal of Experimental Psychology, Human Perception and Performance 25 518-530). To test the lower limit of the zone, linear perspective ton the floor) was varied via introduction of a false perspective (FP) gradient whileall sources of EH information except linear perspective were held constant. For seated (experiment la) observers, the FP gradient produced overestimations of height for rectangular objects up to 0.15 EH tall. This value was taken to be just outside the lower limit of the zone. This finding was replicated in a virtual environment, for both seated (experiment Ib) and standing (experiment 2) observers. For the upper limit of the zone, EH information itself was manipulated by lowering observers' center of projection in a virtual scene. Lowering the effective EH of standing (experiment 3) and seated (experiment 4) observers produced corresponding overestimations of height for objects up to about 2.5 EH. This zone of approximately 0.20-2.5 EH suggests that the human visual system weights size information differentially, depending on its efficacy.

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Documento generato il 25/09/20 alle ore 13:43:25