Situation awareness is the main reason behind different patterns of unsafe behavior among workers and can play a mediating role in the relationship between predictive situational variables and human error. This questionnaire-based study carried out with Iranian workers investigated the direct and indirect effects of work pressure, mental workload, human–systems interaction and environmental distractions on three types of human error (i.e., slips, lapses and mistakes). The results of path analysis showed that, based on model fit indexes, the model is appropriately fit (χ² / df = 3, comparative fit index = 099, Tucker–Lewis index = 0.99, root mean square error of approximation = 026). It was also observed that the effects of four independent variables on all three types of human error are indirect and mediated by situation awareness. Consequently, it is confirmed that situation awareness plays a key role in the occurrence of human error and is a sharp-end causal factor for human error in industrial workplaces.

情境意识是工人不同的不安全行为模式背后的主要原因，并且可以在预测情境变量与人为错误之间的关系中发挥中介作用。这项针对伊朗工人的问卷调查研究调查了工作压力、精神负荷、人机交互和环境干扰对三种人为错误（即失误、失误和错误）的直接和间接影响。通径分析结果表明，基于模型拟合指标，模型拟合良好( χ ²  /  df = 3，比较拟合指数 = 099，Tucker-Lewis 指数 = 0.99，近似的均方根误差 = 026）。还观察到四个自变量对所有三种类型的人为错误的影响是间接的，并由情境意识调节。因此，确认情境意识在人为错误的发生中起着关键作用，是工业工作场所人为错误的尖锐原因。