Event related potentials reveal that increasing perceptual load leads to increased responses for target stimuli and decreased responses for irrelevant stimuli
Rorden, Chris; Guerrini, Chiara; Swainson, Rachel; Lazzeri, Marco; Baylis, Gordon C.
Dr Chiara Guerrini C.Guerrini@hull.ac.uk
Lecturer in Psychology
Gordon C. Baylis
Lavie (1995) have suggested that perceptual processing is influenced by perceptual load. Specifically, relevant information receives additional processing in high load situations exhausting the available capacity. On the other hand, irrelevant information receives less processing with increasing load on a relevant task, as there is a reduced amount of residual processing available. Rees et al. (1997) provided the first physiological evidence for this model, showing this pattern in a functional magnetic resonance imaging study. Likewise, Handy et al. (2001) offered supporting evidence measuring event related potentials (ERPs). Both of these studies presented irrelevant information in peripheral vision. Here we manipulated load while using the identical stimuli and the same task (a peripheral gap judgment task) with centrally presented irrelevant stimuli. ERPs show the pattern predicted by Lavie and colleagues, specifically for the N1 component. This work offers further evidence that visual attention modulates relatively early processing of perceptual information. Specifically, increasing load resulted in stronger N1 responses to relevant information and weaker N1 responses to irrelevant information. © 2008 Rorden, Guerrini, Swainson, Lazzeri and Baylis.
|Journal Article Type||Article|
|Publication Date||May 22, 2008|
|Journal||FRONTIERS IN HUMAN NEUROSCIENCE|
|Peer Reviewed||Peer Reviewed|
|APA6 Citation||Rorden, C., Guerrini, C., Swainson, R., Lazzeri, M., & Baylis, G. C. (2008). Event related potentials reveal that increasing perceptual load leads to increased responses for target stimuli and decreased responses for irrelevant stimuli. Frontiers in human neuroscience, 2(MAY), doi:10.3389/neuro.09.004.2008|
|Keywords||Biological Psychiatry; Behavioral Neuroscience; Neuropsychology and Physiological Psychology; Neurology; Psychiatry and Mental health|
© 2008 Rorden, Guerrini, Swainson, Lazzeri and Baylis. This is an open-access article subject to an exclusive license agreement between the authors and the Frontiers Research Foundation, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are credited.
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