Dissociating electrophysiological correlates of contextual and perceptual learning in a visual search task
| Autor: | Christophe C. Le Dantec, Aaron R. Seitz |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Male
Electroencephalography perceptual learning event-related potentials Medical and Health Sciences 0302 clinical medicine psychophysics N2pc Psychophysics Spatial Evoked Potentials specificity of learning medicine.diagnostic_test 05 social sciences Contextual learning Experimental Psychology Sensory Systems Visual Perception Mental health Female visual search task Psychology Cognitive psychology Adult Spatial Learning Stimulus (physiology) Basic Behavioral and Social Science 050105 experimental psychology Article 03 medical and health sciences Young Adult C1 contextual learning Perceptual learning Clinical Research Orientation Behavioral and Social Science medicine Humans 0501 psychology and cognitive sciences Eye Disease and Disorders of Vision Orientation Spatial Visual search Psychology and Cognitive Sciences Neurosciences Ophthalmology Visual learning 030217 neurology & neurosurgery |
| Zdroj: | Journal of Vision Journal of vision, vol 20, iss 6 |
| ISSN: | 1534-7362 |
| Popis: | Perceptual learning and contextual learning are two types of implicit visual learning that can co-occur in the same tasks. For example, to find an animal in the woods, you need to know where to look in the environment (contextual learning) and you must be able to discriminate its features (perceptual learning). However, contextual and perceptual learning are typically studied using distinct experimental paradigms, and little is known regarding their comparative neural mechanisms. In this study, we investigated contextual and perceptual learning in 12 healthy adult humans as they performed the same visual search task, and we examined psychophysical and electrophysiological (event-related potentials) measures of learning. Participants were trained to look for a visual stimulus, a small line with a specific orientation, presented among distractors. We found better performance for the trained target orientation as compared to an untrained control orientation, reflecting specificity of perceptual learning for the orientation of trained elements. This orientation specificity effect was associated with changes in the C1 component. We also found better performance for repeated spatial configurations as compared to novel ones, reflecting contextual learning. This context-specific effect was associated with the N2pc component. Taken together, these results suggest that contextual and perceptual learning are distinct visual learning phenomena that have different behavioral and electrophysiological characteristics. |
| Databáze: | OpenAIRE |
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