Limits on perceptual encoding can be predicted from known receptive field properties of human visual cortex.
J Exp Psychol Hum Percept Perform
; 42(1): 67-77, 2016 Jan.
Article
em En
| MEDLINE
| ID: mdl-26322687
ABSTRACT
Human cognition has a limited capacity that is often attributed to the brain having finite cognitive resources, but the nature of these resources is usually not specified. Here, we show evidence that perceptual interference between items can be predicted by known receptive field properties of the visual cortex, suggesting that competition within representational maps is an important source of the capacity limitations of visual processing. Across the visual hierarchy, receptive fields get larger and represent more complex, high-level features. Thus, when presented simultaneously, high-level items (e.g., faces) will often land within the same receptive fields, while low-level items (e.g., color patches) will often not. Using a perceptual task, we found long-range interference between high-level items, but only short-range interference for low-level items, with both types of interference being weaker across hemifields. Finally, we show that long-range interference between items appears to occur primarily during perceptual encoding and not during working memory maintenance. These results are naturally explained by the distribution of receptive fields and establish a link between perceptual capacity limits and the underlying neural architecture.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Atenção
/
Córtex Visual
/
Percepção Visual
/
Cognição
/
Memória de Curto Prazo
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article