Attentional effects on sensory tuning for single-feature detection and double-feature conjunction
Attentional effects on sensory tuning for single-feature detection and double-feature conjunction
复制标题
注意对单特征检测和双特征结合的感觉调节的影响
DOI：
10.1016/j.visres.2004.07.014
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发表时间：
2004
期刊：
影响因子：
1.8
通讯作者：
P. Neri
中科院分区：
文献类型：
--
作者：
P. Neri
当人类扫描他们的视觉环境时，相关对象被选择性地关注以进行增强处理。目前还不清楚注意力以什么方式改变加工，以及注意选择是作用于单个特征(如颜色、方向或运动)，还是作用于将不同的特征绑定在一起。在本文报道的实验中，这两个阶段被用心理物理负相关来表征。受试者观看了8个补丁，短暂闪现，对称排列在注视周围。每个贴片由颜色和方向都可能不同的片段组成。在三个不同的实验中，其中一个斑块(目标)在方向、颜色或两者方面都不同于其余的“分心”斑块。受试者被要求检测目标贴片。在刺激措施之前，有一个提示。在一些试验(‘CUED’试验)中，线索通知观察者目标补丁只能出现在八个可能位置中的两个。在剩余的(未提示的)试验中，所有八个职位都有效。心理物理负相关随后被应用来得出仅针对方位、仅针对颜色以及它们的连接的感觉过滤器的线性估计。与大脑皮层单个神经元的特性一致，注意线索不影响用于检测个体特征的感觉调节。然而，它影响了功能随后以乘法方式组合的方式(非常低效)。这一结果与一个模型是一致的，在该模型中，注意通过使来自不同特征的信号通过相互抑制相互控制来重新校准对刺激统计的内部反应。
When humans scan their visual environment, relevant objects are selectively attended for enhanced processing. It is still unclear in what ways processing is modified by attention, and whether attentional selection operates on an individual feature (such as colour, orientation or motion) or on binding together different features. In the experiments reported in this paper, these two stages were characterized using psychophysical reverse correlation. Subjects viewed eight patches, briefly flashed and symmetrically arranged around fixation. Each patch consisted of segments that could vary in both colour and orientation. One of the patches (‘target’) differed from the remaining ‘distractor’ patches with respect to either its orientation, colour, or both (in three different experiments). Subjects were asked to detect the target patch. The stimulus was preceded by a cue. On some trials (‘cued’ trials), the cue informed observers that the target patch could only appear at two of the eight possible locations. On remaining (‘uncued’) trials, all eight positions were valid. Psychophysical reverse correlation was then applied to derive linear estimates of sensory filters for orientation only, colour only, and their conjunction. In line with the properties of single neurons in cortex, attentional cueing did not affect sensory tuning for detecting individual features. However, it affected the way in which features were subsequently (and very inefficiently) combined in a multiplicative fashion. The results are consistent with a model in which attention recalibrates internal responses to the statistics of the stimulus by having signals from different features mutually control each other through reciprocal inhibition.
影响因子：
1.8
作者：
Eckstein, Miguel P.;Shimozaki, Steven S.;Abbey, Craig K.
通讯作者：
Abbey, Craig K.
影响因子：
5.3
作者：
McAdams, CJ;Maunsell, JHR
通讯作者：
Maunsell, JHR