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首页> 外文期刊>Experimental Brain Research >Hazard levels of warning signal words modulate the inhibition of return effect: evidence from the event-related potential P300
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Hazard levels of warning signal words modulate the inhibition of return effect: evidence from the event-related potential P300

机译:警告信号词的危险水平调节了对返回效应的抑制:来自事件相关电位的证据P300

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摘要

Warning signal words are often used to convey valuable information about potential dangers in everyday life. In this study, we explored whether and how the hazard level of warning signal words modulated participants' attention to subsequent targets. Event-related potentials with high temporal resolution were employed in a cue-target paradigm. In this task, warning signal words with different hazard levels were used as cues. Participants were required to judge whether targets were presented on the screen horizontally or vertically. We found an inhibition of return (IOR) effect, i.e., participants had longer reaction times to validly cued targets than to invalidly cued targets. Accordingly, the IOR effect was reflected by a smaller P300 amplitude for invalidly cued targets compared to validly cued targets. Furthermore, the IOR effect was eliminated when the cues were high-hazard words. The dampening effect on the P300 was eliminated when the cues were high-hazard warning signal words. The lack of an IOR was attributed to participants' attentional bias to high-hazard stimuli, which are difficult for participants to disengage their attention from. The current study suggests that warning signal words are a particular type of stimulus that can override the IOR effect. Warning signal words with a high hazard level are more effective in successfully alerting people to risk in a hazardous environment.
机译:警告信号词通常用于传达有关日常生活中潜在危险的有价值的信息。在这项研究中,我们探讨了警告信号词的危险程度是否以及如何调节参与者对后续目标的注意力。具有高时间分辨率的事件相关电位被用于提示目标范式。在此任务中,使用具有不同危险等级的警告信号词作为提示。要求参与者判断目标是水平显示还是垂直显示在屏幕上。我们发现了抑制回报(IOR)的作用,即参与者对有效提示的目标的反应时间比对无效提示的目标的反应时间更长。因此,与有效提示的目标相比,无效提示的目标的P300振幅较小,反映了IOR效果。此外,当提示是高危险性单词时,消除了IOR效果。当提示是高危险警告信号时,消除了对P300的阻尼作用。缺乏IOR的原因是参与者对高危刺激物的注意力偏向,这使参与者难以分散注意力。当前的研究表明警告信号词是一种特殊的刺激类型,可以替代IOR效应。高危险等级的警告信号词可以更有效地成功警告人们在危险环境中的危险。

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