This study took two people who had undergone complete corpus collosum separation. With this, they found the typical things that split brain patients have trouble with. It showed that if an object was placed in their left view they were unable to name it because the left side of the brain deals with language and actually speaking. The same went for when they had something actually placed in their hand, they were unable to identify what it was even if it was very simple. They also were unable to see things that were moving in their left visual field. This overall showed the symptoms that people face after having their corpus collosums separated because the sides of their brains can no longer communicate.
Citation: Joseph, R. (1988). DUAL MENTAL FUNCTIONING IN A SPLIT-BRAIN PATIENT. Journal Of Clinical Psychology, 44(5), 770-779