Looking for a face in the crowd: Fixation-related potentials in an eye-movement visual search task
Despite the compelling contribution of the study of event related potentials (ERPs) and eye movements to cognitive neuroscience, these two approaches have largely evolved independently. We designed an eye-movement visual search paradigm that allowed us to concurrently record EEG and eye movements wh...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2014 |
| País: | Argentina |
| Institución: | Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales |
| Repositorio: | Biblioteca Digital (UBA-FCEN) |
| Idioma: | inglés |
| OAI Identifier: | paperaa:paper_10538119_v89_n_p297_Kaunitz |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_10538119_v89_n_p297_Kaunitz |
| Access Level: | acceso abierto |
| Palabra clave: | EEG Faces Natural scenes Oddball Visual search adult article cognition controlled study electroencephalogram event related potential eye fixation eye movement eye tracking female human human experiment male neuroscience normal human priority journal saccadic eye movement Article electroencephalography latent period task performance visual discrimination visual information visual masking visual stimulation Adult Brain Electroencephalography Evoked Potentials, Visual Face Female Fixation, Ocular Humans Male Photic Stimulation Saccades Visual Perception Young Adult |
| Sumario: | Despite the compelling contribution of the study of event related potentials (ERPs) and eye movements to cognitive neuroscience, these two approaches have largely evolved independently. We designed an eye-movement visual search paradigm that allowed us to concurrently record EEG and eye movements while subjects were asked to find a hidden target face in a crowded scene with distractor faces. Fixation event-related potentials (fERPs) to target and distractor stimuli showed the emergence of robust sensory components associated with the perception of stimuli and cognitive components associated with the detection of target faces. We compared those components with the ones obtained in a control task at fixation: qualitative similarities as well as differences in terms of scalp topography and latency emerged between the two. By using single trial analyses, fixations to target and distractors could be decoded from the EEG signals above chance level in 11 out of 12 subjects. Our results show that EEG signatures related to cognitive behavior develop across spatially unconstrained exploration of natural scenes and provide a first step towards understanding the mechanisms of target detection during natural search. © 2013 The Authors. |
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