Event-related potentials dissociate facilitation and interference effects in the numerical Stroop paradigm
Event-related potentials dissociate facilitation and interference effects in the numerical Stroop paradigm
In the numerical Stroop paradigm (NSP) participants compare simultaneously presented Arabic digits based on either their numerical or on their physical size dimension. Responses are faster when the numerical and size dimensions are congruent with each other (facilitation), and responses are slower when the numerical and size dimensions are incongruent with each other (interference). We aimed to find out whether facilitation and interference appears during the course of perceptual or response processing. To this end, facilitation and interference effects in the amplitude of event-related brain potentials (ERPs) were examined. The onset of motor preparation was determined by monitoring the lateralized readiness potential. In numerical comparison one facilitation effect was related to perceptual processing at the level of the magnitude representation. A second facilitation effect and interference effects appeared during response processing. In size comparison facilitation and interference appeared exclusively during response processing. In both tasks, ERP interference effects were probably related to contextual analysis and to the conflict monitoring and selection for action activity of the anterior cingulate cortex. The results demonstrate that facilitation and interference effects in the NSP appear during multiple stages of processing, and that they are related to different cognitive processes. Therefore these effects should be clearly separated in studies of the NSP. A model of the processes involved in the NSP is provided and implications for studies of the NSP are drawn.
numerical cognition, stroop effect, parietal magnitude representation, distance effect, perceptual and response processing, anterior cingulate cortex, N400, P3b, LPC
3190-3202
Szűcs, Dénes
1020f888-a7ba-48b6-861a-42a7f6ff716c
Soltész, Fruzsina
cbc12e4b-9d6f-4c24-8203-47ae2bd8f470
2007
Szűcs, Dénes
1020f888-a7ba-48b6-861a-42a7f6ff716c
Soltész, Fruzsina
cbc12e4b-9d6f-4c24-8203-47ae2bd8f470
Abstract
In the numerical Stroop paradigm (NSP) participants compare simultaneously presented Arabic digits based on either their numerical or on their physical size dimension. Responses are faster when the numerical and size dimensions are congruent with each other (facilitation), and responses are slower when the numerical and size dimensions are incongruent with each other (interference). We aimed to find out whether facilitation and interference appears during the course of perceptual or response processing. To this end, facilitation and interference effects in the amplitude of event-related brain potentials (ERPs) were examined. The onset of motor preparation was determined by monitoring the lateralized readiness potential. In numerical comparison one facilitation effect was related to perceptual processing at the level of the magnitude representation. A second facilitation effect and interference effects appeared during response processing. In size comparison facilitation and interference appeared exclusively during response processing. In both tasks, ERP interference effects were probably related to contextual analysis and to the conflict monitoring and selection for action activity of the anterior cingulate cortex. The results demonstrate that facilitation and interference effects in the NSP appear during multiple stages of processing, and that they are related to different cognitive processes. Therefore these effects should be clearly separated in studies of the NSP. A model of the processes involved in the NSP is provided and implications for studies of the NSP are drawn.
This record has no associated files available for download.
More information
Accepted/In Press date: 22 June 2007
e-pub ahead of print date: 29 June 2007
Published date: 2007
Keywords:
numerical cognition, stroop effect, parietal magnitude representation, distance effect, perceptual and response processing, anterior cingulate cortex, N400, P3b, LPC
Organisations:
Psychology
Identifiers
Local EPrints ID: 375352
URI: http://eprints.soton.ac.uk/id/eprint/375352
ISSN: 0028-3932
PURE UUID: 57eac2cf-90b5-4913-8258-48debd5ee405
Catalogue record
Date deposited: 27 Mar 2015 16:40
Last modified: 14 Mar 2024 19:24
Export record
Altmetrics
Contributors
Author:
Dénes Szűcs
Author:
Fruzsina Soltész
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics