FIGURE 2.22 Testing a Split-Brain Person As a split-brain person focuses her attention on the middle of the screen, information is briefly flashed to either the left or right side of the midpoint. In Task 1, information is flashed to her right visual field, sending it to her left verbal hemisphere. When asked about the information, she easily names it. In Task 2, information is directed to her left visual field, sending it to her right non-verbal hemisphere. When asked about the information, she is unable to verbally reply with the correct answer. But when asked to use her left hand, which is controlled by the same right nonverbal hemisphere that detected the flashed image, she is able to reach under the screen, feel the different objects, and pick up the correct one (Gazzaniga, 1983).

Source: Research from Sperry (1982).