[article] 
inScience & motricité > 89 (Octobre 2015) . - p.17-27

Titre :	Effects of distance and eye-height on time-to-contact estimates
Titre original :	Les effets de la distance et du point-de-vue sur le jugement du temps de pré-contact
Type de document :	texte imprimé
Auteurs :	Heiko Hecht, Auteur ; Klaus Landwehr, Auteur ; Bernhard Both, Auteur
Année de publication :	2015
Article en page(s) :	p.17-27
Langues :	Anglais (eng)
Mots-clés :	Visual perception  distance  eye-height  time-to-collision  perspective
Résumé :	When making time-to-contact estimations, observers often factor misleading information into their judgments, maybe sacrificing accuracy for the sake of decision speed. We investigated to what extent judgments are vulnerable to misleading information caused by changes in observer perspective. Five experiments tested effects of distance and eye-height on predictions of object-object collisions seen against the background of a regular, an irregular, or a null ground-surface texture. By selectively keeping either viewing time, time-to-collision, or velocity constant, we unconfounded these variables. A total of 62 observers responded relatively earlier at greater distances, lower eye-heights, and longer times-to-collision. Ground-surface texture was practically ineffective. Results are discussed with regard to the controversies regarding the effects of irrelevant cues on the ability to extract the information relevant for making reliable estimates.
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[article] Effects of distance and eye-height on time-to-contact estimates = Les effets de la distance et du point-de-vue sur le jugement du temps de pré-contact [texte imprimé] / Heiko Hecht, Auteur ; Klaus Landwehr, Auteur ; Bernhard Both, Auteur . - 2015 . - p.17-27.
Langues : Anglais (eng)
in Science & motricité > 89 (Octobre 2015) . - p.17-27

Mots-clés :	Visual perception  distance  eye-height  time-to-collision  perspective
Résumé :	When making time-to-contact estimations, observers often factor misleading information into their judgments, maybe sacrificing accuracy for the sake of decision speed. We investigated to what extent judgments are vulnerable to misleading information caused by changes in observer perspective. Five experiments tested effects of distance and eye-height on predictions of object-object collisions seen against the background of a regular, an irregular, or a null ground-surface texture. By selectively keeping either viewing time, time-to-collision, or velocity constant, we unconfounded these variables. A total of 62 observers responded relatively earlier at greater distances, lower eye-heights, and longer times-to-collision. Ground-surface texture was practically ineffective. Results are discussed with regard to the controversies regarding the effects of irrelevant cues on the ability to extract the information relevant for making reliable estimates.
Permalink :	./index.php?lvl=notice_display&id=40823