Selective processing of multiple features in the human brain: effects of feature type and salience.
Selective processing of multiple features in the human brain: effects of feature type and salience.
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DOI：
10.1371/journal.pone.0016824
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发表时间：
2011-02-09
期刊：
影响因子：
3.7
通讯作者：
Keil A
中科院分区：
文献类型：
--
作者：
McGinnis EM;Keil A
在给定的恒定空间位置处识别物品流中的目标依赖于对诸如颜色、形状或纹理等方面的选择。刺激的这种关注（目标）特征引起负向事件相关脑电位（ERP），称为选择负性（SN），它已被用作选择性特征加工的指标。在两个实验中，参与者观看了一系列的Gabor补丁，其中目标被定义为颜色，方向和形状的特定组合。分心物由目标刺激的颜色、方向和形状的不同组合组成。这种设计允许对具有和不具有特定目标特征的项目进行比较。与以前的ERP研究相一致，SN偏转延伸160-300 ms。随后的P3分量（刺激后300-450 ms）的数据也进行了检查，并被视为目标加工的指标。在实验A中，目标颜色对SN和P3振幅的影响占主导地位，沿着，随着方向和形状的变化，ERP差异较小。操纵颜色是不太突出，同时提高显着性的方向的伽柏补丁（实验B）导致延迟的颜色选择和增强的方向选择。地形分析表明，头皮上的SN的位置可靠地随待护理特征的性质而变化。未观察到SN上的非目标特征干扰。这些结果表明，目标功能选择操作的功能特定的感觉过程的电皮层促进的手段，和选择性的电皮层促进是更有效的刺激显着性提高时。
Identifying targets in a stream of items at a given constant spatial location relies on selection of aspects such as color, shape, or texture. Such attended (target) features of a stimulus elicit a negative-going event-related brain potential (ERP), termed Selection Negativity (SN), which has been used as an index of selective feature processing. In two experiments, participants viewed a series of Gabor patches in which targets were defined as a specific combination of color, orientation, and shape. Distracters were composed of different combinations of color, orientation, and shape of the target stimulus. This design allows comparisons of items with and without specific target features. Consistent with previous ERP research, SN deflections extended between 160–300 ms. Data from the subsequent P3 component (300–450 ms post-stimulus) were also examined, and were regarded as an index of target processing. In Experiment A, predominant effects of target color on SN and P3 amplitudes were found, along with smaller ERP differences in response to variations of orientation and shape. Manipulating color to be less salient while enhancing the saliency of the orientation of the Gabor patch (Experiment B) led to delayed color selection and enhanced orientation selection. Topographical analyses suggested that the location of SN on the scalp reliably varies with the nature of the to-be-attended feature. No interference of non-target features on the SN was observed. These results suggest that target feature selection operates by means of electrocortical facilitation of feature-specific sensory processes, and that selective electrocortical facilitation is more effective when stimulus saliency is heightened.
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影响因子：
9.2
作者：
Gegenfurtner, KR;Rieger, J
通讯作者：
Rieger, J
影响因子：
2.6
作者：
HARTER, MR;AINE, C;SCHROEDER, C
通讯作者：
SCHROEDER, C
DOI：
10.1111/j.1749-6632.1984.tb23525.x
发表时间：
1984-01-01
影响因子：
5.2
作者：
AINE, CJ;HARTER, MR
通讯作者：
HARTER, MR
影响因子：
0.8
作者：
DUNCAN, J;ULGER, A
通讯作者：
ULGER, A
影响因子：
2.9
作者：
Keil, Andreas;Mueller, Matthias M.
通讯作者：
Mueller, Matthias M.