School of Public Administration, School of Emergency Management, Northwest University, Xi'an, China.
School of Public Administration, School of Emergency Management, Northwest University, Xi'an, China.
Int J Psychophysiol. 2023 Nov;193:112248. doi: 10.1016/j.ijpsycho.2023.112248. Epub 2023 Sep 29.
Whether motor inhibition impacts the motor interference effect of dangerous objects is controversial. Previous studies have manipulated task type and found that dangerous objects elicited increased motor inhibition compared to safe objects in the reachability judgment task but not in the categorization task. However, it was still unclear why motor inhibition was reduced for dangerous objects in the categorization task. We speculated that the activation strength of object affordance might modulate the occurrence of motor inhibition. To test this hypothesis, the present study designed a prime-target grasping consistency judgment task and manipulated target grips (power grip vs. precision grip), target dangerousness (dangerous vs. safe), and Go/NoGo (Go vs. NoGo). The results showed that under the condition of high activation strength of the target affordance (i.e., power grip targets), processing dangerous targets evoked increased motor inhibition (reflected by a more negative frontal N2 component) compared to safe targets and produced a motor interference effect in reaction time (RT). In contrast, under the condition of low target affordance activation strength (i.e., precision grip targets), processing dangerous targets facilitated RT compared to safe targets, with no difference found between the dangerous and safe conditions in the frontal N2 component. Furthermore, compared to safe objects, dangerous objects attracted more attention and recruited more cognitive resources to select appropriate responses to them. This study extended the findings of previous studies on the motor interference effect by highlighting the importance of activation strength for eliciting motor inhibition based on the prime-target consistency judgment task.
运动抑制是否会影响危险物体的运动干扰效应存在争议。先前的研究通过操纵任务类型发现，在可触及性判断任务中，与安全物体相比，危险物体引起了更大的运动抑制，但在分类任务中并非如此。然而，为什么在分类任务中危险物体的运动抑制会降低仍然不清楚。我们推测，物体可供性的激活强度可能会调节运动抑制的发生。为了验证这一假设，本研究设计了一个启动-目标抓握一致性判断任务，并操纵了目标抓握方式（力握 vs. 精准握）、目标危险程度（危险 vs. 安全）和 Go/NoGo（Go vs. NoGo）。结果表明，在目标可供性的激活强度较高的情况下（即力握目标），处理危险目标比处理安全目标会引起更大的运动抑制（反映在更负的额部 N2 成分上），并在反应时间（RT）上产生运动干扰效应。相比之下，在目标可供性激活强度较低的情况下（即精准握目标），处理危险目标比处理安全目标的 RT 更快，而额部 N2 成分在危险和安全条件之间没有差异。此外，与安全物体相比，危险物体吸引了更多的注意力，并调动了更多的认知资源来选择对它们的适当反应。本研究通过强调基于启动-目标一致性判断任务的激活强度对于引发运动抑制的重要性，扩展了先前关于运动干扰效应的研究结果。
