Safety in the Field: Assessing the Impact of Stress and Fatigue on Situation Awareness in Irish and British Farmers

Abstract

Situation awareness (SA) is a cognitive safety-critical skill, consisting of three levels – perception, comprehension, and anticipation. SA lapses have been associated with many incidents and accidents across high-risk industries. Stress and fatigue can negatively impact SA, leading to some of these lapses. More recently, the importance of SA has also been acknowledged in agriculture, the most dangerous industry in Ireland and the United Kingdom by injury and fatality rate. The current study aimed to explore SA lapses and the impact of stress and fatigue on SA in agriculture. Fifteen Irish and British farmers were interviewed using the critical incident technique followed by general questions on stress and fatigue in farming. In the critical incident section, interviewees were asked to verbally recall a recent negative farming experience, an error that occurred, or adverse conditions which they had to manage on the farm while feeling tired or stressed. Additional questions were asked to uncover implicit knowledge on SA lapses, stress, and fatigue. Interviews were analysed using qualitative content analysis. SA lapses were reportedly involved in all accidents and incidents. Many occurred at the perception level, as a failure to monitor or observe data, usually because of attentional narrowing. Several lapses also occurred at the comprehension level as an incomplete or an inaccurate mental model, usually in the context of a recent change in equipment or machinery. Stress and fatigue had a negative impact on SA through cognitive impairments. A twofold strategy is suggested, focused on strengthening SA and managing stress and fatigue.