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Table 2 Questions of the NASA Task Load Index

From: Validation of a mechanism to balance exercise difficulty in robot-assisted upper-extremity rehabilitation after stroke

Sub-Scales Endpoints Question
Mental Demand Low/High How mentally demanding was the task?
Physical Demand Low/High How physically demanding was the task
Temporal Demand Low/High How hurried or rushed was the pace of the task?
Performance Good/Poor How successful were you in accomplishing what you were asked to do?
Effort Low/High How hard did you have to work to accomplish your level of performance?
Frustration Level Low/High How insecure, discouraged, irritated, stressed and annoyed were you?
  1. Used to obtain the subjective workload of a subject [45, 46].