A population-coding model of attention's influence on contrast response: Estimating neural effects from psychophysical data.

A population-coding model of attention's influence on contrast response: Estimating neural effects from psychophysical data.
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DOI:
10.1016/j.visres.2008.09.018
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发表时间:
2009-06
期刊:
影响因子:
1.8
通讯作者:
Carrasco M
Carrasco M
中科院分区:
心理学3区
文献类型:
--
作者:
Pestilli F;Ling S;Carrasco M

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人类心理物理学和猴子生理学研究表明,注意力可以调节早期视力——对比敏感度和处理能力。但我们如何才能将注意力对知觉表现的影响与其神经基础联系起来呢?在这里,我们实现了一个群体编码模型,该模型根据心理物理数据估计注意力对群体对比反应的影响。模型结果表明,内源性(持续的、自愿的)注意力通过对比增益改变群体对比反应,而外源性(短暂的、非自愿的)注意力通过反应增益改变群体对比反应。
Human psychophysics and monkey physiology studies have shown that attention modulates early vision – contrast sensitivity and processing. But how can we bridge the effects of attention on perceptual performance to their neural underpinnings? Here we implement a population-coding model that estimates attentional effects on population contrast response given psychophysical data. Model results show that whereas endogenous (sustained, voluntary) attention changes population contrast-response via contrast gain, exogenous (transient, involuntary) attention changes population contrast-response via response gain.
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