Table 2.

Subjects’ Likert-scale rating of subjective comfort during electrode preparation and while wearing the headsets. SD = standard deviation.

Comfort Level Rating	Dry electrodesn (mean/median/SD)	Wet electrodes (mean/median/SD)	Statistical comparison
During electrode preparation	5.83/6/1.34	5.64/6/1.37	Z = 0.87, p = 0.390
After wearing the headsets for 20 min	5.75/6/1.08	5.42/6/1.13	Z = 1.82, p = 0.068
After wearing the headsets for 30 min	5.69/6/1.02	4.54/6/0.73	Z = 4.14, p = <0.001
After wearing the headsets for 60 min	5.07/5/0.63	3.24/3/0.35	Z = 4.94, p < 0.001