Table 2 NASA-rTLX factors and descriptions ( Hart and Staveland, [1988])
NASA-rTLX factors | Rating scale | Description |
|---|---|---|
Mental demand | 1-100 (Low-High) | How much mental and perceptual activity was required (e.g., thinking, deciding, calculating, remembering, looking, searching, etc.)? Was the mission easy or demanding, simple or complex, exacting or forgiving? |
Physical demand | 1-100 (Low-High) | How much physical activity was required (e.g., pushing, pulling, turning, controlling, activating, etc.)? Was the mission easy or demanding, slow or brisk, slack or strenuous, restful or laborious? |
Temporal demand | 1-100 (Low-High) | How much time pressure did you feel due to the rate or pace at which the mission occurred? Was the pace slow and leisurely or rapid and frantic? |
Performance | 1-100 (Good-Poor) | How successful do you think you were in accomplishing the goals of the mission? How satisfied were you with your performance in accomplishing these goals? |
Effort | 1-100 (Low-High) | How hard did you have to work (mentally and physically) to accomplish your level of performance? |
Frustration | 1-100 (Low-High) | How discouraged, stressed, irritated, and annoyed versus gratified, relaxed, content, and complacent did you feel during your mission? |