Ps were asked to cover one of their eyes and fixate on a point. An image would appear for a tenth of a second to a patients right visual field (processed by the left hemisphere) and an image is projected for a tenth of a second to the left visual field (processed by the right hemisphere).
In normal brains, the corpus callosum would share info between both hemispheres giving a complete pic of the world. But in a split brain patient, that info can't travel from one hemisphere to the other
