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The influence of response competition on cerebral asymmetries for processing hierarchical stimuli revealed by ERP
Peter Malinowski1, Ronald Hübner, Andreas Keil
1Cognitive Neuroscience and Neuropsychology, Department of Psychology, University of Liverpool, Eleanor Rathbone Building, Liverpool L69 7ZA, UK. petermal@liverpool.ac.uk
Abstract:
It is widely accepted that the left and right hemispheres differ with respect to the processing of global and local aspects of visual stimuli. Recently, behavioural experiments have shown that this processing asymmetry strongly depends on the response competition between the global and local levels of a stimulus. Here we report electrophysiological data that underline this observation. Hemispheric differences for global/local processing were mainly observed for response-incompatible stimuli and were most prominent between 320 and 400 ms after stimulus onset. These results underpin the idea that hemispheric differences are more likely to show up when a more elaborated stimulus representation is needed for triggering the response, that is, when a response conflict has to be resolved.
