So Sperry asked a question. He said, “What happens to these people?” It was clear that, by cutting the corpus callosum, their seizures were made better but were they still one person? What did cutting the brain, basically in half, do to a person? So he studied these patients in great detail.
I’ve had patients with this as well and what he found is what I and other neurosurgeons who have dealt with this have found, that you cut the brain basically in half and—except for the fact that their seizures usually get better—they’re no different. They’re perfectly all right…
I’m not aware of anyone who has brought up the point that the split brain surgery strongly supports the viewpoint that the intellect is metaphysically simple and is an immaterial power of the mind, even though the research obviously supports that view.Michael Egnor, “ If your brain were cut in half, would you still be one person?” at Mind Matters News
Sperry himself thought that his research supported an immaterial view of the mind but many sources talk around the point when describing his work.