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Incongruence in number–luminance congruency effects

Identifieur interne : 000D33 ( Main/Exploration ); précédent : 000D32; suivant : 000D34

Incongruence in number–luminance congruency effects

Auteurs : Titia Gebuis [Pays-Bas, Belgique] ; Maarten J. Van Der Smagt [Pays-Bas]

Source :

RBID : PMC:3025115

Abstract

Congruency tasks have provided support for an amodal magnitude system for magnitudes that have a “spatial” character, but conflicting results have been obtained for magnitudes that do not (e.g., luminance). In this study, we extricated the factors that underlie these number–luminance congruency effects and tested alternative explanations: (unsigned) luminance contrast and saliency. When luminance had to be compared under specific task conditions, we revealed, for the first time, a true influence of number on luminance judgments: Darker stimuli were consistently associated with numerically larger stimuli. However, when number had to be compared, luminance contrast, not luminance, influenced number judgments. Apparently, associations exist between number and luminance, as well as luminance contrast, of which the latter is probably stronger. Therefore, similar tasks, comprising exactly the same stimuli, can lead to distinct interference effects.

Electronic supplementary material

The online version of this article (doi:10.3758/s13414-010-0002-9) contains supplementary material, which is available to authorized users.


Url:
DOI: 10.3758/s13414-010-0002-9
PubMed: 21258924
PubMed Central: 3025115


Affiliations:


Links toward previous steps (curation, corpus...)


Le document en format XML

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