It's not arbitrary touching. When he's asking her about something she's unsure of, he consistently touches her left shoulder. When he talks to her about something sure, he touches her right. Then he uses those same touches when he wants to make her unsure or a color, or feel sure that a color is the wrong one he says it is.
I don't know to what degree that actually works, but it's pretty interesting.
I don't know to what degree that actually works, but it's pretty interesting.