Event-related potential response to attended and unattended locations in an interference task

Event-related potentials were measured in response to an interference task in which unattended stimulus items were compatible, incompatible or neutral with regard to the attended stimulus items. Two stimulus items were presented simultaneously and bilaterally—one in each visual field. This allowed e...

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Bibliographic Details
Published in:Biological psychology 1998-05, Vol.48 (1), p.1-19
Main Authors: Drysdale, KA, Fulham, W.R, Finlay, D.C
Format: Article
Language:English
Subjects:
Adult
Behavioral psychophysiology
Bilateral presentation
Biological and medical sciences
Electroencephalography
Electrophysiology
ERPs
Evoked Potentials, Visual - physiology
Female
Fundamental and applied biological sciences. Psychology
Humans
Interference task
Male
Mental Processes
Middle Aged
Photic Stimulation
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Spatial cueing
Visual attention
Visual Perception - physiology
Visual separation
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Summary:Event-related potentials were measured in response to an interference task in which unattended stimulus items were compatible, incompatible or neutral with regard to the attended stimulus items. Two stimulus items were presented simultaneously and bilaterally—one in each visual field. This allowed examination of the event-related potential waveform according to whether recording sites were contralateral to the attended or unattended location. The first experiment used sustained cueing with 3.5° separation between attended and unattended locations. Attentional modulation of the N1 was observed but not for the P1. In the second experiment, separation between attended and unattended locations was increased to 11.5°. In both experiments, the hemisphere contralateral to the unattended material (unattended hemisphere) showed a greater negativity in the N2 latency range in the temporal regions to compatible and incompatible conditions compared to a neutral condition. These data are inconsistent with findings suggesting the filtering of material early in visual processing.
ISSN:0301-0511
1873-6246
DOI:10.1016/S0301-0511(98)00003-9