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首页> 外文期刊>Brain research >Increased visual task difficulty enhances attentional capture by both visual and auditory distractor stimuli
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Increased visual task difficulty enhances attentional capture by both visual and auditory distractor stimuli

机译：随着视觉和听觉分散的刺激，增加了视觉任务难度提高了注意力捕获

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Previous studies using a three-stimulus oddball task have shown the amplitude of P3a elicited by distractor stimuli increases when perceptual discrimination between standard and target stimuli becomes difficult. This means that the attentional capture by the distractor stimuli is enhanced along with an increase in task difficulty. So far, the increase of P3a has been reported when standard, target, and distractor stimuli were presented within one sensory modality (i.e., visual or auditory). In the present study, we further investigated whether or not the increase of P3a can also be observed when the distractor stimuli are presented in a different modality from the standard and target stimuli. Twelve participants performed a three-stimulus oddball task in which they were required to discriminate between visual standard and target stimuli. As the distractor stimuli, either another visual stimulus or an auditory stimulus was presented in separate blocks. Visual distractor stimuli elicited P3a, and its amplitude increased when visual standard/target discrimination was difficult, replicating previous findings. Auditory distractor stimuli elicited P3a, and importantly, its amplitude also increased when visual standard/target discrimination was difficult. This result means that attentional capture by distractor stimuli can be enhanced even when the distractor stimuli are presented in a different modality from the standard and target stimuli. Possible mechanisms and implications are discussed in terms of the relative saliency of distractor stimuli, influences of temporal/spatial attention, and the load involved in a task. (C) 2017 Elsevier B.V. All rights reserved.
机译：先前使用三刺激壁球任务的研究表明，当标准和目标刺激之间的感知鉴别变得困难时，通过分散的刺激引起的P3a的幅度增加。这意味着随着任务刺激的注意力捕捉随着任务难度的增加而增强。到目前为止，当标准，目标和分散组刺激在一个感官模态（即视觉或听觉）内时，已经报告了P3a的增加。在本研究中，我们进一步研究了当分散的刺激在标准和靶标刺激的不同方式呈现时也可以观察到P3a的增加。十二名参与者进行了三刺激壁球任务，其中他们被要求区分视觉标准和目标刺激。随着分散的刺激，在单独的块中呈现另一个视觉刺激或听觉刺激。当视觉标准/目标辨别难以复制之前的发现时，视觉扰乱刺激刺激P3a，并且其幅度增加。听觉分散组刺激引发P3a，重要的是，当视觉标准/目标歧视困难时，其幅度也增加。该结果意味着即使在来自标准和靶标刺激的不同方式呈现出分散的刺激时，也可以提高注意者刺激的注意力捕获。在令人满意的刺激的相对显着性，时间/空间关注的影响以及任务所涉及的负荷的情况下，讨论了可能的机制和含义。 （c）2017 Elsevier B.v.保留所有权利。

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