ABSTRACT

Hazard recognition is mainly a visual search and cognitive process. Mental representations of hazards may impact mental states of hazard recognition. We assessed the effects of critical indicators of mental presentations of construction hazards on prefrontal cortex activation, a proxy for the mental states of hazard recognition. Students participated in a hazard inspection experiment, with near-infrared spectroscopy (NIRS) used to record prefrontal cortex activation. The effects of critical indicators of the hazards’ mental representations on prefrontal activation were analyzed. Results demonstrated that site familiarity, risk tolerance and safety knowledge have significant effects on medial prefrontal activation for hazards at a low visual clutter level. High levels of site familiarity and risk tolerance reduced medial prefrontal activation and saved cognitive resources. Theoretically, the findings supplement the knowledge of safety hazards’ mental representations; and practically, the findings guide provision of individual-specific guidance for improving workers’ hazard inspection performance.

摘要

危险识别主要是一个视觉搜索和认知过程。危险的心理表征可能会影响危险识别的心理状态。我们评估了施工危险心理呈现的关键指标对前额叶皮层激活的影响，前额叶皮层是危险识别心理状态的代表。学生们参加了一项危险检查实验，使用近红外光谱 (NIRS) 记录前额叶皮层的激活。分析了危害心理表征的关键指标对前额激活的影响。结果表明，现场熟悉度、风险承受能力和安全知识对低视觉杂波水平下的内侧前额叶激活有显着影响。高水平的站点熟悉度和风险承受能力减少了内侧前额叶激活并节省了认知资源。理论上，这些发现补充了安全隐患心理表征的知识；实际上，调查结果指导了针对个人的具体指导，以提高工人的危险检查绩效。