To observe aroused attention, you need to be in a position where you can see the action of the pupils of the person's eyes. The actions of the pupils of their eyes focus on the external information, followed by moving to the left or the right. In general, moving to the left indicates mental processing in the right hemisphere, where sensorimotor information is located, most of the time. Moving to the right indicates mental processing in the left hemisphere, where language information is located, most of the time.