THE EFFECT OF SUPRATHRESHOLD CONTRAST ON STIMULUS CENTROID AND ITS IMPLICATIONS FOR THE PERCEIVED LOCATION OF OBJECTS

Authors
WHITAKER D MCGRAW PV
Citation
D. Whitaker et Pv. Mcgraw, THE EFFECT OF SUPRATHRESHOLD CONTRAST ON STIMULUS CENTROID AND ITS IMPLICATIONS FOR THE PERCEIVED LOCATION OF OBJECTS, Vision research (Oxford), 38(22), 1998, pp. 3591-3599
Citations number
15
Categorie Soggetti
Neurosciences,Ophthalmology
Journal title
Vision research (Oxford) → ACNP
ISSN journal
00426989
Volume
38
Issue
22
Year of publication
1998
Pages
3591 - 3599
Database
ISI
SICI code
0042-6989(1998)38:22<3591:TEOSCO>2.0.ZU;2-9
Abstract
Using an alignment task, we investigate the role of suprathreshold con trast upon the perceived location of asymmetric Gaussian-windowed stim uli. A model which extracts the centroid of the stimulus envelope betw een limits defined by contrast threshold accounts well for the observe d variation in perceived position. This finding helps to explain previ ous discrepancies in the literature regarding the validity of stimulus centroid as a determinant of visual location. (C) 1998 Elsevier Scien ce Ltd. All rights reserved.