The role of subjective factors in the information search process
Journal of the American Society for Information Science and Technology
Performance effects of multi-sensory displays in virtual teleoperation environments
Proceedings of the 1st symposium on Spatial user interaction
Autonomous control in military logistics vehicles: trust and safety analysis
EPCE'13 Proceedings of the 10th international conference on Engineering Psychology and Cognitive Ergonomics: applications and services - Volume Part II
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Motivation -- Assessment of cognitive load on user tasks is useful for characterizing user interfaces and tasks with respect to their demands on the user's mental effort. Research approach -- We conducted a controlled experiment with 48 subjects. The primary task involved information search. Stroop-like task was used as a secondary task. Reaction time to the secondary task events was used to assess cognitive load. Findings/Design -- Reaction time on the secondary task differentiated between the primary task stages and the user interfaces. Higher cognitive load component of the secondary task performance discriminated primary task stages, while lower cognitive load component discriminated user interfaces. Research limitations/Implications -- Results presented in this short paper were an unexpected finding. They are thus preliminary and need to be confirmed in further experiments. Originality/Value -- This finding promises a method that separates extraneous cognitive load from intrinsic load. Take away message -- Secondary task can be designed to yield separate assessment of intrinsic and extraneous load.