Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.1/4868
Título: The interaction between surface color and color knowledge: behavioral and electrophysiological evidence
Autor: Bramão, Inês
Faísca, Luís
Forkstam, Christian
Inácio, Filomena
Araújo, Susana
Petersson, Karl Magnus
Reis, Alexandra
Palavras-chave: ERPs
Object identification
Surface color
Color knowledge
Color verification
Data: 2012
Editora: Elsevier
Citação: Bramao, Ines; Faísca, Luís; Forkstam, Christian; Inacio, Filomena; Araujo, Susana; Petersson, Karl Magnus; Reis, Alexandra. The interaction between surface color and color knowledge: Behavioral and electrophysiological evidence, Brain and Cognition, 78, 1, 28-37, 2012.
Resumo: In this study, we used event-related potentials (ERPs) to evaluate the contribution of surface color and color knowledge information in object identification. We constructed two color-object verification tasks – a surface and a knowledge verification task – using high color diagnostic objects; both typical and atypical color versions of the same object were presented. Continuous electroencephalogram was recorded from 26 subjects. A cluster randomization procedure was used to explore the differences between typical and atypical color objects in each task. In the color knowledge task, we found two significant clusters that were consistent with the N350 and late positive complex (LPC) effects. Atypical color objects elicited more negative ERPs compared to typical color objects. The color effect found in the N350 time window suggests that surface color is an important cue that facilitates the selection of a stored object representation from long-term memory. Moreover, the observed LPC effect suggests that surface color activates associated semantic knowledge about the object, including color knowledge representations. We did not find any significant differences between typical and atypical color objects in the surface color verification task, which indicates that there is little contribution of color knowledge to resolve the surface color verification. Our main results suggest that surface color is an important visual cue that triggers color knowledge, thereby facilitating object identification.
Peer review: yes
URI: http://hdl.handle.net/10400.1/4868
DOI: http://dx.doi.org/10.1016/j.bandc.2011.10.004
ISSN: 0278-2626
Versão do Editor: http://www.sciencedirect.com/science/article/pii/S027826261100193X
Aparece nas colecções:FCH2-Artigos (em revistas ou actas indexadas)

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