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2 results on '"Kalliopi Christoforidis"'

1. Can application and transfer of strategy be observed in low visibility condition?

Author

Imen El Karoui, Kalliopi Christoforidis, and Lionel Naccache

Subjects
Medicine, Science
Abstract

It has been long assumed that cognitive control processes can only be applied on consciously visible stimuli, but empirical evidence is contradictory. In the present study, we investigated strategic adaptation to conflict both in unmasked and in low-visibility masked trials. Using a paradigm derived from the Stroop task, we studied the application of strategies, but also the transfer of a strategy developed in unmasked trials to masked trials, and the trial-to-trial dynamics of strategic processing. In unmasked trials, we found evidence of strategic adaptation to conflict, both in reaction times and in ERPs (N2 and P300). In masked trials we found no evidence of behavioral adaptation to conflict, but a modulation of the P300 was present in masked trials included in unmasked blocks, suggesting the existence of a transfer of strategy. Finally, trial-to-trial analyses in unmasked trials revealed a pattern suggestive of dynamic subjective adherence to the instructed strategy.

Published
2017
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2. Can application and transfer of strategy be observed in low visibility condition?

Author

Kalliopi Christoforidis, Imen El Karoui, Lionel Naccache, HAL UPMC, Gestionnaire, Institut du Cerveau et de la Moëlle Epinière = Brain and Spine Institute (ICM), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Pitié-Salpêtrière [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Service de Neurophysiologie [CHU Pitié-Salpêtrière], CHU Pitié-Salpêtrière [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), and Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)

Subjects
Male, Physiology, lcsh:Medicine, Event-Related Potentials, Social Sciences, Neuropsychological Tests, Conflict, Psychological, 0302 clinical medicine, Cognition, Learning and Memory, Adaptation, Psychological, Medicine and Health Sciences, Psychology, lcsh:Science, Evoked Potentials, Behavioral adaptation, Clinical Neurophysiology, Brain Mapping, Multidisciplinary, 05 social sciences, Visibility (geometry), Electroencephalography, Electrophysiology, Bioassays and Physiological Analysis, Brain Electrophysiology, Physical Sciences, [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Female, Cognitive psychology, Research Article, Consciousness, Imaging Techniques, Permutation, Cognitive Neuroscience, Neurophysiology, Neuroimaging, Research and Analysis Methods, 050105 experimental psychology, 03 medical and health sciences, Reaction Time, Learning, Humans, 0501 psychology and cognitive sciences, [SDV.NEU] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Behavior, Discrete Mathematics, lcsh:R, Electrophysiological Techniques, Cognitive Psychology, Biology and Life Sciences, Nontherapeutic Human Experimentation, Combinatorics, Conflict (Psychology), Stroop Test, Cognitive Science, lcsh:Q, Clinical Medicine, Metacognition, 030217 neurology & neurosurgery, Mathematics, Photic Stimulation, Stroop effect, Neuroscience
Abstract

International audience; It has been long assumed that cognitive control processes can only be applied on consciously visible stimuli, but empirical evidence is contradictory. In the present study, we investigated strategic adaptation to conflict both in unmasked and in low-visibility masked trials. Using a paradigm derived from the Stroop task, we studied the application of strategies, but also the transfer of a strategy developed in unmasked trials to masked trials, and the trial-to-trial dynamics of strategic processing. In unmasked trials, we found evidence of strategic adaptation to conflict, both in reaction times and in ERPs (N2 and P300). In masked trials we found no evidence of behavioral adaptation to conflict, but a modulation of the P300 was present in masked trials included in unmasked blocks, suggesting the existence of a transfer of strategy. Finally, trial-to-trial analyses in unmasked trials revealed a pattern suggestive of dynamic subjective adherence to the instructed strategy.

Published
2017
Full Text
View/download PDF

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