期刊
VISION RESEARCH
卷 45, 期 11, 页码 1459-1469出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.visres.2005.01.004
关键词
natural images; backward masking; early processing; information integration; event-related potentials (ERP)
Human observers are very good at deciding whether briefly flashed novel images contain an animal and previous work has shown that the underlying visual processing can be performed in under 150 ms. Here we used a masking paradigm to determine how information accumulates over time during such high-level categorisation tasks. As the delay between test image and mask is increased, both behavioural accuracy and differential ERP amplitude rapidly increase to reach asymptotic levels around 40-60 ms. Such results imply that processing at each stage in the visual system is remarkably rapid, with information accumulating almost continuously following the onset of activation. (c) 2005 Elsevier Ltd. All rights reserved.
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