Asymmetries in a unilateral flanker task depend on the direction of the response: The role of attentional shift and perceptual grouping
Asymmetries in a unilateral flanker task depend on the direction of the response: The role of attentional shift and perceptual grouping
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DOI：
10.1037/0096-1523.26.1.113
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发表时间：
2000-02-01
影响因子：
2.1
通讯作者：
Danziger, S
中科院分区：
文献类型：
--
作者：
Diedrichsen, J;Ivry, RB;Danziger, S
四个实验采用侧翼任务，一个干扰物出现在中心目标的左侧或右侧。应答是在与显示器平行的键盘上进行的。当干扰物与响应在同一侧时，侧翼效应更大。造成这种不对称的原因有两个。首先，当侧翼和目标相同时，两者组成一组，并分配一个空间标签，根据响应键与组之间的兼容性创建一种形式的西蒙效应。其次，侧化反应的准备似乎需要视觉注意向相应方向转移，从而增强了反应侧侧的加工。与第二种假设一致的是，参与者更有可能正确地识别出在与回答同一侧的干扰位置短暂出现的字母。
Four experiments were conducted using a flanker task with 1 distracter appearing either on the left or right side of a central target. Responses were made on a keyboard aligned parallel to the displays. A larger flanker effect was obtained when the distracter was on the same side as the response. Two factors account for this asymmetry. First, when the flanker and target are identical, the 2 form a group that is assigned a spatial tag, creating a form of the Simon effect on the basis of the compatibility between the response keys and the group. Second, preparation of a lateralized response appears to entail a shift of visual attention in the corresponding direction, thus enhancing processing of the flanker on the response side. Consistent with the 2nd hypothesis, participants were more likely to correctly recognize letters that were briefly presented at the distracter position on the same side as the response.