Table 7 The NASA task load index
The NASA Task Load Index | Mean score (±SD) | ||
|---|---|---|---|
All subjects (n = 30) | Novices without feedback (n = 15) | Novices with feedback (n = 15) | |
Mental Demands: How much mental effort is required to complete a task? | 43.67 (±17.90) | 50.00 (±18.90) | 37.33 (±14.86) |
Physical demands: How much or little is the physical burden of completing the task? | 31.00 (±16.68) | 32.67 (±17.10) | 29.33 (±16.68) |
Time requirements: Do you complete tasks slowly or flustered? | 47.67 (±25.96) | 58.00 (±26.78) | 37.33 (±21.20) |
Effort: How much or how little effort did you put into completing the task? | 43.67 (±21.73) | 46.00 (±21.97) | 41.33 (±22.00) |
Frustration: Do you feel safe/gratified/satisfied/relieved? | 66.33 (±32.32) | 59.33 (±34.74) | 73.33 (±28.95) |