system of weighted scales. Neither the weighting system nor the numer-
ical ranges on the scale seem to have made any dierence in experimental
results, and are not considered further here.
There are other subjective rating systems for workload, which are
catalogued in Matthews and Reinerman- Jones (2017) and Gowran (2019b).
Some are close variations of themes found in the NASA- TLX, while others
examine other aspects of workload in formats more similar to a survey or
questionnaire. There is also a group- level workload survey with scales that
parallel the NASA- TLX in rating style and content: coordination, ...
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