title: The role of numerical magnitude and order in the illusory perception of size and brightness.
abstract: Processing magnitudes constitutes a common experience across multiple dimensions, for example when one has to compare sizes, duration, numbers, sound height or loudness. From a cognitive point of view, however, it is still unclear whether all these experiences rely on a common system, or on distinct systems, with more or less strong associations. One particularly striking way of observing such interference between the spatial and numerical dimensions consists in eliciting a bias in size judgment through the mere perception of irrelevant numerical stimuli. In such experimental context though, two questions remain open. First, it is still unknown whether the direction of the bias is related to the magnitude of the number presented, or to their position in an ordinal sequence, and thus could be elicited by other non-numerical ordinal sequences such as letters of the alphabet. Second, it is still unclear whether the observed interactions generalize to other continuous dimension of magnitude such as brightness. In the study reported here, both letters and numbers were used in a size- and a brightness-reproduction task. We observed a dissociation between the two types of stimuli when reproducing size, the illusion being elicited solely by numbers. When reproducing brightness, however, neither the letters nor the numbers elicited a bias. These findings suggest that, while only numerical magnitude, and not letters, elicits a bias in size perception, the concurrent processing of magnitude and brightness does not bring about the same illusion, supporting the idea of a relative independence in the processing of these two dimensions.
authors.affiliation: Laboratoire Psychologie de la Perception, UMR 8158 CNRS, Université Paris Descartes Paris, France.
authors.forename: Arnaud
authors.initials: A
authors.lastname: Viarouge
authors.forename: Maria Dolores
authors.initials: MD
authors.lastname: de Hevia
keywords: brightness perception; cognitive Illusion; magnitude system; numerical cognition
references.citation: Cognition. 2003 Jul;88(3):B1-10
references.pmid: 12804817
references.citation: Mem Cognit. 1982 Jul;10(4):389-95
references.pmid: 7132716
references.citation: Psychon Bull Rev. 2008 Apr;15(2):419-25
references.pmid: 18488662
references.citation: PLoS One. 2011;6(8):e23553
references.pmid: 21853151
references.citation: Exp Psychol. 2006;53(1):58-68
references.pmid: 16610273
references.citation: Exp Brain Res. 2006 Jan;168(1-2):254-64
references.pmid: 16044296
references.citation: Cognition. 1992 Aug;44(1-2):1-42
references.pmid: 1511583
references.citation: Exp Psychol. 2006;53(2):87-94
references.pmid: 16909932
references.citation: Cognition. 2007 Jan;102(1):101-17
references.pmid: 17046735
references.citation: Cognition. 2008 Jul;108(1):263-70
references.pmid: 18313655
references.citation: Mem Cognit. 2005 Jun;33(4):681-95
references.pmid: 16248333
references.citation: Psychon Bull Rev. 2007 Jun;14(3):512-6
references.pmid: 17874598
references.citation: J Vis. 2007 Jul 06;7(10):2.1-5
references.pmid: 17997671
references.citation: Trends Cogn Sci. 2003 Nov;7(11):483-8
references.pmid: 14585444
references.citation: Cogn Neuropsychol. 2012;29(1-2):149-73
references.pmid: 22966853
references.citation: PLoS One. 2012;7(4):e35530
references.pmid: 22536399
references.citation: Atten Percept Psychophys. 2012 Aug;74(6):1226-40
references.pmid: 22484796
references.citation: J Exp Psychol Gen. 2010 Feb;139(1):180-90
references.pmid: 20121318
references.citation: Cognition. 2006 Mar;99(2):113-29
references.pmid: 15925355
references.citation: Front Hum Neurosci. 2011 Oct 21;5:115
references.pmid: 22028688
references.citation: Neurology. 2001 Sep 11;57(5):822-6
references.pmid: 11552011
references.citation: Exp Brain Res. 2010 Mar;201(3):599-605
references.pmid: 19888566
references.citation: Prog Neurobiol. 2008 Feb;84(2):132-47
references.pmid: 18155348
references.citation: Atten Percept Psychophys. 2012 Jul;74(5):1001-8
references.pmid: 22477059
references.citation: Cognition. 2008 Sep;108(3):810-8
references.pmid: 18538756
references.citation: Trends Cogn Sci. 2001 Nov 1;5(11):460-462
references.pmid: 11684466
references.citation: Q J Exp Psychol (Hove). 2008 Oct;61(10):1496-514
references.pmid: 17924288
references.citation: Psychol Res. 2001 Nov;65(4):250-9
references.pmid: 11789429
references.citation: Nat Neurosci. 2003 Jun;6(6):555-6
references.pmid: 12754517
references.citation: J Neurosci. 2007 Aug 15;27(33):8952-6
references.pmid: 17699676
references.citation: Cognition. 2003 Apr;87(3):B87-95
references.pmid: 12684205
references.citation: Neuropsychologia. 2008 Jan 31;46(2):426-33
references.pmid: 17931670
references.citation: Cognition. 2011 Apr;119(1):114-9
references.pmid: 21262509
references.citation: Cognition. 2009 Feb;110(2):198-207
references.pmid: 19095223
references.citation: Exp Brain Res. 2010 Sep;205(4):479-87
references.pmid: 20700733
references.citation: Curr Biol. 2010 Mar 23;20(6):R264-5
references.pmid: 20334829
references.citation: J Exp Psychol Learn Mem Cogn. 1999 May;25(3):680-701
references.pmid: 10368928
references.citation: Cereb Cortex. 2008 Feb;18(2):337-43
references.pmid: 17556772
references.citation: Philos Trans R Soc Lond B Biol Sci. 2009 Jul 12;364(1525):1831-40
references.pmid: 19487186
references.citation: Nat Rev Neurosci. 2005 Jun;6(6):435-48
references.pmid: 15928716
references.citation: Cortex. 2008 Apr;44(4):400-5
references.pmid: 18387571
references.citation: Brain Res Cogn Brain Res. 2001 Dec;12(3):415-23
references.pmid: 11689301
references.citation: Neuropsychologia. 2005;43(5):779-83
references.pmid: 15721190
references.citation: J Opt Soc Am A. 1986 Jan;3(1):34-9
references.pmid: 3950790
references.citation: Vision Res. 2008 Sep;48(20):2128-42
references.pmid: 18606433
references.citation: Spat Vis. 1997;10(4):433-6
references.pmid: 9176952
references.citation: Exp Psychol. 2004;51(2):91-7
references.pmid: 15114901
references.citation: ScientificWorldJournal. 2012;2012:347068
references.pmid: 22629133
references.citation: Neuron. 2004 Mar 25;41(6):983-93
references.pmid: 15046729
references.citation: J Exp Child Psychol. 2000 Jun;76(2):104-22
references.pmid: 10788305
references.citation: Cogn Neuropsychol. 2003 May 1;20(3):487-506
references.pmid: 20957581
references.citation: Neuropsychologia. 2009 Oct;47(12):2615-24
references.pmid: 19465038
references.citation: Cortex. 2004 Feb;40(1):171-2
references.pmid: 15174454
references.citation: J Exp Psychol Hum Percept Perform. 2003 Jun;29(3):507-22
references.pmid: 12848323