We will now prepare the final areas of the face.
Firstly, swab the point directly in the centre of the forehead.
Next, swab the area directly up from the outer edge of the participant's right eyebrow, just below the hairline.
Abrade both areas. When dry, attach a dot electrode to the middle forehead area. Don't worry about the upper right area - a different type of electrode will be placed there by the set up technician.
Since the central area will be the location of the final and most important of our reference electrodes, and the upper right area will be the first of our EEG (brainwave-recording) electrodes, it would be wise to spend extra time abrading these sites.