caa a22 4500 606163174 CHVBK 20210128100642.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s11062-015-9511-4 doi (NATIONALLICENCE)springer-10.1007/s11062-015-9511-4 Dissociation Between Attention and Consciousness During a Novel Task: An ERP Study [Elektronische Daten] [R. Davoodi, M. Moradi, A. Yoonessi] While consciousness and attention seem to be tightly connected, recent evidence has suggested that one of these processes can be present in the absence of the other. Recent researches showed that observers can pay attention to an invisible (unconscious) stimulus, and that a stimulus can be clearly perceived (seen) in the absence of attention. We have proposed a novel psychophysical task to explore neural correlates of top-down attention and consciousness. The task is meant to confirm that these two processes can occur independently of each other. EEG was recorded during realizations of the task, and target-locked event-related potentials (ERPs) for masked and unmasked conditions were constructed. Time features corresponding to the P100, N150, and P300 components were extracted for each channel separately. Utilizing these features, we employed some common classifiers for classification of the fourfold state. Our task could separate attention and consciousness successfully through their neural correlates. The results indicate that some of the mentioned components changed when attention or consciousness occurs. By comparing difference waves in each condition separately, our results introduce new ERP correlates of attention and consciousness. We also revealed that parieto-occipital areas are the most relevant areas for dissociation between attention and consciousness. To our knowledge, this is the first time that these correlates are introduced in a separable mode, and the classification accuracies are reported for this purpose. Springer Science+Business Media New York, 2015 top-down attention nationallicence consciousness nationallicence ERP nationallicence psychophysical task nationallicence image stimuli nationallicence Davoodi R. Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran aut Moradi M. Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran aut Yoonessi A. Iranian National Center for Addiction Studies, Institute for Cognitive Science Studies, and School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran aut Neurophysiology Springer US; http://www.springer-ny.com 47/2(2015-04-01), 144-154 0090-2977 47:2<144 2015 47 11062 https://doi.org/10.1007/s11062-015-9511-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11062-015-9511-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Davoodi R. Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran aut NATIONALLICENCE 700 1- Moradi M. Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran aut NATIONALLICENCE 700 1- Yoonessi A. Iranian National Center for Addiction Studies, Institute for Cognitive Science Studies, and School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran aut NATIONALLICENCE 773 0- Neurophysiology Springer US; http://www.springer-ny.com 47/2(2015-04-01), 144-154 0090-2977 47:2<144 2015 47 11062