Two Dimensions of Visibility Revealed by Multidimensional Scaling of Metacontrast

Autor/in	Sackur, Jerome
Titel	Two Dimensions of Visibility Revealed by Multidimensional Scaling of Metacontrast
Quelle	In: Cognition, 126 (2013) 2, S.173-180 (8 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0010-0277
DOI	10.1016/j.cognition.2012.09.013
Schlagwörter	Multidimensional Scaling; Models; Stimuli; Perception; Spatial Ability; Visual Measures + Suchen Sie Ihr Suchwort? Mehrdimensionale Analysis; Analogiemodell; Anreizsystem; Wahrnehmung; Räumliches Vorstellungsvermögen
Abstract	An increasing number of studies use subjective reports of visibility, so as to delineate the domain of perceptual awareness. It is generally assumed that degrees of visibility can be ordered on a single unidimensional scale. Here, I put this assumption to test with metacontrast, one of the most studied visual masking paradigms. By means of multidimensional scaling, I show that even though metacontrast stimuli only differ along the dimension of time, the perceptual space they generate unfolds in three dimensions: time and two kinds of visibilities, that are confounded when projected onto a unitary visibility scale. I argue that metacontrast creates multidimensional complex percepts, a property that may run counter to its use as a simple modulator of visibility. More broadly the results cast doubt on the use of visibility scales that ignore the qualities of the percepts. (Contains 5 figures.) (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10