Design Matters: Scale Design and Rounding Ratings Impacts NASA-TLX Results
Proceedings of the Human Factors and Ergonomics Society Annual Meeting
Published online on August 31, 2025
Abstract
Proceedings of the Human Factors and Ergonomics Society Annual Meeting, Volume 69, Issue 1, Page 1192-1194, September 2025.
The NASA Task Load Index (NASA-TLX) is a widely used subjective measure of mental workload (MWL), but its visual design and postcollection data manipulation (rounding) practices lack standardization across studies. These inconsistencies may bias results. ...
The NASA Task Load Index (NASA-TLX) is a widely used subjective measure of mental workload (MWL), but its visual design and postcollection data manipulation (rounding) practices lack standardization across studies. These inconsistencies may bias results. ...