Divided Visual Field Method for Investigating Hemisphere Differences
This diagram is an illustration of how visual information is transmitted to the left and right sides of the brain. The person is looking at the point at the center of the visual field. Visual information presented to the right of a personís point of focus (brown in the diagram) is directly transmitted to the visual cortex at the back of the left hemisphere. Similarly, visual information presented to the left of a personís point of focus (white in the diagram) is directly transmitted to the visual cortex at the back of the right hemisphere. In our studies, we briefly present words or syllables to the right visual field (RVF) or left visual field (LVF) and ask participants to make a response. In many verbal tasks people respond more quickly and accurately to stimuli in the RVF (left hemisphere) as compared to the LVF (right hemisphere). By varying the type of stimuli and the experimental task, and observing how people perform with LVF and RVF stimuli, we can infer differences in how the left and right hemispheres process information.