ABSTRACT
Mental workload must be measured effectively and efficiently for it to be used to evaluate human performance in operational tests and evaluations. Objective performance measurement of mental workload was described theoretically as an extensive structure using axiomatic formal measurement theory (Krantz, Luce, Suppes and Tversky, 1971). Three important concepts were defined by observable operations: mental workload entities, an equivalence/comparison relation, and concatenation. Relationships to conjoint measurement and to the Subjective Workload Assessment Technique (Reid and Nygren, 1988) were discussed. Operational evaluations may be conducted by using the concept of a mental workload ‘redline’ which can be applied to both objective and subjective measures.
