Young, Mark (2021) In search of the redline: perspectives on mental workload and the ‘underload problem’. Longo, L. and Leva, M. Chiara (eds.) In Human Mental Workload: Models and Applications : Proceedings of the 5th International Symposium, H-WORKLOAD 2021. vol. 1494, Springer Cham. pp. 3-10 . (doi:10.1007/978-3-030-91408-0_1).
Abstract
For human factors researchers and practitioners, mental workload remains both a crucial concept and a nebulous one. After decades of work in this field, there is still no real consensus on the construct of mental workload, although there is wide agreement about its multidimensional nature and the main ways to measure it. With increasing automation in many domains, the issue of underload has attracted a considerable proportion of research effort. This paper summarises work to propose a theory of underload based on the notion of malleable attentional resources, but also raises challenges that this theory – and, perhaps, underload in general – may be specific to automation. The paper goes on to discuss the elusive ‘redlines’ of overload and underload, and concludes by considering both theoretical and applied challenges for current research into mental workload.
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