Abstract
Mental workload is a central concept to a range of disciplines (including cognitive ergonomics) and has been the subject of various debates. As a result, a number of different techniques have been used by researchers. In this study, we focus on the comparison of performance and physiological measures of mental workload. We describe a puzzle-solving experiment in which we combined multiple measures of mental workload. The results highlight a number of issues. We stress several theoretical and methodological questions that may help to reach a clearer understanding of the nature of the mental workload concept.Keywordsmental workloaddissociationdual-task paradigmeye dilation
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