A training device aims to indicate a targeted object to be gazed at by a trainee, then trainees visual sight to the targeted object is obstructed. After a selected duration a hint is given to the trainee to execute command actions related to the targeted object. Through completeness degree of trainees execution of the command actions trainees stillness can be evaluated and trained. During measuring electrophysiological signals such as brainwaves, trainees feedback command actions can serve as a basis for measurement of electrophysiological signals.
