%0 Journal Article %T A common signal detection model accounts for both perception and discrimination of the watercolor effect %+ Laboratoire de Psychologie : Cognition, Comportement, Communication (LP3C - EA1285) %A Devinck, Frédéric %< avec comité de lecture %@ 1534-7362 %J Journal of Vision %I Association for Research in Vision and Ophthalmology %V 12 %N 3 %P 19 - 19 %8 2012-03-01 %D 2012 %R 10.1167/12.3.19 %Z Humanities and Social Sciences/Psychology %Z Humanities and Social SciencesJournal articles %X Establishing the relation between perception and discrimination is a fundamental objective in psychophysics, with the goal of characterizing the neural mechanisms mediating perception. Here, we show that a procedure for estimating a perceptual scale based on a signal detection model also predicts discrimination performance. We use a recently developed procedure, Maximum Likelihood Difference Scaling (MLDS), to measure the perceptual strength of a long-range, color, filling-in phenomenon, the Watercolor Effect (WCE), as a function of the luminance ratio between the two components of its generating contour. MLDS is based on an equal-variance, Gaussian, signal detection model and yields a perceptual scale with interval properties. The strength of the fill-in percept increased 10–15 times the estimate of the internal noise level for a 3-fold increase in the luminance ratio. Each observer's estimated scale predicted discrimination performance in a subsequent paired-comparison task. A common signal detection model accounts for both the appearance and discrimination data. Since signal detection theory provides a common metric for relating discrimination performance and neural response, the results have implications for comparing perceptual and neural response functions. %G English %L hal-01764850 %U https://univ-rennes2.hal.science/hal-01764850 %~ SHS %~ UNIV-BREST %~ UR2-HB %~ UNIV-UBS %~ UNIV-RENNES2 %~ LPC3 %~ UNIV-RENNES %~ LP3C %~ IBSHS