Research article
Monotony in the rail industry: the role of task demand in mitigating monotony-related effects on performance
Dunn N. Williamson A.
Ergonomics Australia – HFESA 2011 Conference Edition, 2011 11:44.
Abstract
Background: Although monotony is widely recognised as being detrimental to performance, its occurrence and effects are not yet well understood. This is despite the fact that task-related characteristics, such as monotony and task-related fatigue, have been shown to contribute to performance decrements over time. Aim: To investigate the effects of varying task demands on experiences of monotony and performance and their relevance to the rail industry. Method: Study 1 was a state-wide survey of train drivers investigating aspects of drivers’ experiences of monotony and fatigue and what they perceive to be the factors contributing to these experiences. Study 2 used a computer-based train simulator to determine the effect of varying levels of task demand on the subjective experience and performance of train drivers when driving prolonged monotonous routes. Results: Survey results indicated that monotony and fatigue are issues that many drivers face on a regular basis and they are issues that can have a detrimental effect on drivers’ train management skills. Drivers highlighted various factors they felt contributed to their experiences of monotony and fatigue, as well as the coping strategies they utilised. Results from study 2 clearly showed the effect of task demand on the performance of an otherwise monotonous task, with superior driving performance exhibited by those in the high demand condition. There was also a clear indication of a time-on-task effect in all conditions, as performance deteriorated towards the end of the test session. Conclusions: Monotony is an inherent characteristic of transport industries, including rail, aviation and road transport, which can have adverse impact on safety, reliability and efficiency. These studies highlight possible strategies for mitigating these adverse effects.
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