Table 5.

The average scores of the NASA-Task Load Index (NASA-TLX) and the weighted scores of its subscales for the group of healthy participants that tested the gel-based and dry electrodes.

NASA-TLX
Subscale	Healthy (Gel)	Healthy (Dry)
Mental demand	8 (±8)	18 (±9)
Physical demand	2 (±2)	0.3 (±0.7)
Temporal demand	7 (±8)	12 (±7)
Performance	10 (±9)	13 (±7)
Effort	9 (±9)	9 (±7)
Frustration	6 (±5)	2 (±2)
Total score	42 (±20)	55 (±15)

The maximum possible subscale score is 33.33 and the maximum total score 100, with higher score indicating higher workload.