NASA-TLXNational Aeronautics and Space Administration Task Load Index
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Considering previous research on NASA-TLX (DiDomenico & Nussbaum, 2011) showing a limited practical relevance of its performance dimension (since it is influenced by variations in physical load), CarMen-Q revises that dimension and does not include items associated to job's physical aspects in order to obtain a pure measure of MW.
Assuming that both aspects are related, the following objectives are proposed: (a) to evaluate the WL perceived by psychology students, (b) to group students according to their negative or positive perception of the AC and (c) to analyze the effects of the perceived AC on this WL, measured with the NASA-TLX.
2009) [12] have compared the output of the Multiple Resources Questionnaire (MRQ) and NASA-TLX in different task types and operating environments.
Considering convenience and reliability, NASA-TLX was selected to measure a participant's workload and its components are provided in table 2.
The multidimensional nature of the NASA-TLX allowed us to evaluate the task independent workload associated with the use of the DSS and the workload associated with the interaction between the task and the DSS.
Upon completion of the Wii session, participants completed the POMS (McNair, Lorr, & Droppleman, 1971) and NASA-TLX (Hart & Staveland, 1998) were administered along with the gaming questionnaire.
That component was selected as the exemplar because it was the most challenging component, as evidenced by the NASA-TLX outcomes, and it was also associated with other performance changes.
Ergonomic conditions were evaluated through the Ergonomics Evaluation List (OIT); Mental work load was analyzed with the NASA-TLX (Hart & Staveland, 1988) and stress was measured with the SWS--Survey (Gutierrez & Ostermann, 1994).
The view that vigilance tasks are highly demanding comes from experiments with the NASA-TLX showing that the workload of vigilance tasks falls in the middle to upper range of the scale (Warm et al.
In that study, workload was measured by the NASA-TLX while task-induced stress was measured via the Task engagement and distress scales of the Dundee Stress State Questionnaire (DSSQ; Matthews et al.
Figure 3 compares the total NASA-TLX workload among the three levels of task difficulty.