A reevaluation of the electrophysiological correlates of expert object processing

• Main Authors: Lisa S. Scott, James W. Tanaka, David L. Sheinberg, Tim Curran
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2006
• Subjects: snowy owl
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.531.9692; http://psych.colorado.edu/~tcurran/LScott_JOCN.pdf

& Subordinate-level object processing is regarded as a hallmark novel exemplars, and exemplars from novel species. Event-of perceptual expertise. However, the relative contribution of related potentials indicated that both basic- and subordinate-subordinate- and basic-level category experience in the acquisi- level training enhanced the early N170 component, but only tion of perceptual expertise has not been clearly delineated. In subordinate-level training amplified the later N250 component. this study, participants learned to classify wading birds and owls These results are consistent with models positing separate basic at either the basic (e.g., wading bird, owl) or the subordinate and subordinate learning mechanisms, and, contrary to perspec-(e.g., egret, snowy owl) level. After 6 days of training, behavioral tives attempting to explain visual expertise solely in terms of results showed that subordinate-level but not basic-level train- subordinate-level processing, suggest that expertise enhances ing improved subordinate discrimination of trained exemplars, neural responses of both basic and subordinate processing. &