Neural correlates of reward-driven attentional capture in visual search
Neural correlates of reward-driven attentional capture in visual search
复制标题
视觉搜索中奖励驱动的注意力捕获的神经关联
DOI：
10.1016/j.brainres.2013.07.044
复制
发表时间：
2013-09-26
期刊：
影响因子：
2.9
通讯作者：
Li, Hong
中科院分区：
文献类型：
--
作者：
Qi, Senqing;Zeng, Qinghong;Li, Hong
事件相关电位（ERP）用于研究先前与奖励相关的物理上不显着且与任务无关的刺激特征是否可以吸引注意力。在训练阶段，参与者隐式地将某种颜色与奖励联系起来。在随后的测试阶段，参与者在非目标形状中寻找形状独特的单例，其颜色与当前任务需求完全无关。与没有相关干扰物的试验相比，在向目标同时呈现相关干扰物的试验中，反应时间有所延迟。在 ERP 中，当垂直经线上出现并发目标时，与奖励相关的侧向干扰物会引发 N2pc 成分。对照实验排除了这种 N2pc 是由对与奖励相关的干扰项的熟悉程度引起的可能性。在另一侧同时呈现目标和奖励相关的干扰物会引发 N2pc，其中奖励相关的干扰物引发的 N2pc 先于目标引发的 N2pc，尽管仅在反应缓慢的试验中。这些结果表明，参与者只有在缓慢的试验中注意到与任务无关的奖励相关的干扰因素后，才会将注意力转移到目标上。因此，与任务无关的奖励驱动的显着性可以吸引注意力。在存在横向分心器和中线目标的快速分心器试验中观察到分心器积极性。因此，应积极抑制与奖励相关的干扰因素，以有效地选择与任务相关的目标。最后，分心引起的 N2pc 与奖励驱动得分的个体差异呈负相关。这种相关性可以帮助我们深入了解奖励敏感性问题。 (c) 2013 Elsevier B.V. 保留所有权利。
Event-related potentials (ERPs) were used to investigate whether a physically non-salient and task-irrelevant stimulus feature previously associated with reward can capture attention. In the training phase, participants implicitly associated a certain color with reward. In the subsequent test phase, participants searched for a uniquely shaped singleton among non-target shapes, with color completely irrelevant to the current task demand. Response time was delayed on trials wherein the target was simultaneously presented with an associated distracter, compared with trials without one. In ERPs, a lateralized reward-associated distracter elicited an N2pc component when a concurrent target was presented on the vertical meridian. The control experiment discounted the possibility that this N2pc was caused by familiarity of the reward-associated distracter. Presenting both the target and reward-associated distracter on the opposite side elicited N2pc, with the reward-associated distracter-elicited N2pc preceding the target-elicited N2pc, albeit only in trials with slow responses. These results show that the participants shifted their attention to the target only after noticing the task-irrelevant reward-associated distracter in slow trials. Therefore, task-irrelevant reward-driven salience can capture attention. Distracter positivity was observed in fast distracter-present trials presenting both a lateral distracter and a midline target. Thus, the reward-associated distracter should be actively suppressed to efficiently select the task-relevant target. Lastly, the distracter-elicited N2pc was negatively correlated with individual differences in reward drive score. This correlation may provide insight into reward sensitivity problems. (c) 2013 Elsevier B.V. All rights reserved.