Table 2.

Experimental process.

Step	Operator activities	Subject activities	Rough duration (min)
(1) Information	Inform subjects of the general aim and rough content of the experiment	Sign the consent and fill the questionnaire.	3
(2) Setup	EEG cap placement with gel infusion, acquisition setup, and time calibration	Be seated.	20
(3) Rest baseline	EEG monitoring and acquisition	Be seated in quiet and relaxed manner, with eyes open.	2
(4) Control instruction	Inform subjects of what they are expected to do in the immediately following step	Understand the instruction and communicate, if necessary, to avoid ambiguousness.	2
(5) Control experiment	EEG monitoring and acquisition	Act as instructed.	15
(6) Memory task instruction	Inform subjects of what they are expected to do in the immediately following step	Understand the instruction and communicate, if necessary, to avoid ambiguousness.	2
7.Memory task experiment	EEG monitoring and acquisition	Act as instructed.	15