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Article type: Research Article
Authors: Stivalet, Philippea; * | Marendaz, Christianb | Barraclough, Lornab | Mourareau, Christianc
Affiliations: [a] Centre de Recherches du Service de Sante des Armees, La Tronche Cedex, France | [b] Laboratoire de Psychologie Experimentale, Grenoble Cedex, France | [c] Laboratoire d’Etudes Médico-physiologiques, Centre d’Etude et de Recherche de Médecine Aérospatiale Base Aérienne, France
Note: [*] Reprint address: Philippe Stivalet, C.R.S.S.A., Unité de Psychologie, 24, avenue des Maquis du Grésivaudan, BP 87-38702-La Tronche Cedex, France.
Abstract: To see if the spatial reference frame used by pre-attentive vision is specified in a retino-centered frame or in a reference frame integrating visual and nonvisual information (vestibular and somatosensory), subjects were centrifuged in a nonpendular cabin and were asked to search for a target distinguishable from distractors by difference in orientation (Treisman’s “pop-out” paradigm [1]). In a control condition, in which subjects were sitting Immobilized but not centrifuged, this task gave an asymmetric search pattern: Search was rapid and pre-attentional except when the target was aligned with the horizontal retinal/head axis, in which case search was slow and attentional (2). Results using a centrifuge showed that slow/serial search patterns were obtained when the target was aligned with the subjective horizontal axis (and not with the horizontal retinal/head axis). These data suggest that a multisensory reference frame is used in pre-attentive vision. The results are interpreted in terms of Riccio and Stoffregen’s “ecological theory” of orientation in which the vertical and horizontal axes constitute independent reference frames (3).
Keywords: early vision, pre-attentive vision, spatial orientation, gravitational effects
DOI: 10.3233/VES-1995-5204
Journal: Journal of Vestibular Research, vol. 5, no. 2, pp. 125-135, 1995
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