Target enhancement and distractor inhibition affect transitory surround suppression in dual tasks using multiple rapid serial visual presentation streams
Target enhancement and distractor inhibition affect transitory surround suppression in dual tasks using multiple rapid serial visual presentation streams
复制标题
目标增强和干扰抑制会影响使用多个快速串行视觉呈现流的双重任务中的短暂环绕抑制
DOI：
10.1080/17470218.2015.1099712
复制
发表时间：
2016-09-01
影响因子：
1.7
通讯作者：
Fu，Shimin
中科院分区：
文献类型：
--
作者：
Wu，Xia;Greenwood，Pamela;Fu，Shimin
在多重快速序列视觉呈现（RSVP）范式下，利用双重任务研究了时间维度和空间维度对选择性注意的影响。实验中观察到了环绕抑制在空间上随时间变化的现象（在本研究中称为瞬时环绕抑制，TSS），表明这种时空相互作用的存在。然而，目前还不清楚是否目标增强或干扰抑制调制TSS。四个行为实验进行了研究TSS的机制，通过操纵的时间滞后和空间距离因素之间的两个目标嵌入在6个RSVP流。TSS效应在消除知觉效应和注意转换混淆的研究（实验1）中被复制。然而，当两个目标共享相同的颜色时，在被试间设计（实验2a）和被试内设计（实验2b）中，TSS消失，这表明目标增强对TSS的影响。此外，类内干扰项的TSS大于类间干扰项（实验3），表明干扰项抑制对TSS的影响。在骨骼设计中进一步证实了目标和干扰物加工的不同加工需求对TSS的这两种影响（实验4）。总体而言，目标增强和干扰抑制的联合作用有助于视觉搜索过程中选择性注意的时空交互作用机制。
Few studies have investigated the interaction between temporal and spatial dimensions on selective attention using dual tasks in the multiple rapid serial visual presentation (RSVP) paradigm. A phenomenon that the surround suppression in space changes over time (termed transitory surround suppression, TSS, in the present study) has been observed, suggesting the existence of this time–space interaction. However, it is still unclear whether target enhancement or distractor inhibition modulates TSS. Four behavioural experiments were conducted to investigate the mechanism of TSS by manipulating the temporal lag and spatial distance factors between two targets embedded in six RSVP streams. The TSS effect was replicated in a study that eliminated confounds of perceptual effects and attentional switch (Experiment 1). However, the TSS disappeared when two targets shared the same colour in a between-subjects design (Experiment 2a) and a within-subject design (Experiment 2b), suggesting the impact of target enhancement on TSS. Moreover, the TSS was larger for within-category than for between-category distractors (Experiment 3), indicating the impact of distractor inhibition on TSS. These two influences on TSS under different processing demands of target and distractor processing were further confirmed in a skeletal design (Experiment 4). Overall, combinative effects of target enhancement and distractor suppression contribute to the mechanisms of time–space interaction in selective attention during visual search.