A Bayesian Model of the Memory Colour Effect

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Witzel , C , Olkkonen , M & Gegenfurtner , K R 2018 , ' A Bayesian Model of the Memory Colour Effect ' , i-Perception , vol. 9 , no. 3 , 2041669518771715 . https://doi.org/10.1177/2041669518771715

Title: A Bayesian Model of the Memory Colour Effect
Author: Witzel, Christoph; Olkkonen, Maria; Gegenfurtner, Karl R.
Contributor organization: Medicum
Perception Action Cognition
Department of Psychology and Logopedics
Date: 2018-05-07
Language: eng
Number of pages: 16
Belongs to series: i-Perception
ISSN: 2041-6695
DOI: https://doi.org/10.1177/2041669518771715
URI: http://hdl.handle.net/10138/235328
Abstract: According to the memory colour effect, the colour of a colour-diagnostic object is not perceived independently of the object itself. Instead, it has been shown through an achromatic adjustment method that colour-diagnostic objects still appear slightly in their typical colour, even when they are colourimetrically grey. Bayesian models provide a promising approach to capture the effect of prior knowledge on colour perception and to link these effects to more general effects of cue integration. Here, we model memory colour effects using prior knowledge about typical colours as priors for the grey adjustments in a Bayesian model. This simple model does not involve any fitting of free parameters. The Bayesian model roughly captured the magnitude of the measured memory colour effect for photographs of objects. To some extent, the model predicted observed differences in memory colour effects across objects. The model could not account for the differences in memory colour effects across different levels of realism in the object images. The Bayesian model provides a particularly simple account of memory colour effects, capturing some of the multiple sources of variation of these effects.
Subject: bayesian model
cognitive penetration
colour vision
object recognition
515 Psychology
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion

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