Final answer:
Split-brain patients are being used to investigate if they show color perception without access to color perception or names, and to determine the role of the corpus callosum and frontal lobe in color processing and recognition.
Step-by-step explanation:
The researchers are using split-brain patients in a replication of 'Study 1' to investigate whether the patients show color perception in the absence of access to color perception. By presenting target colors only in the left visual field, the researchers can determine if the patients are able to select the option that best matches the target color without access to color names. This procedure specifically aims to test if the corpus callosum, which connects the left and right hemispheres of the brain, plays a significant role in color processing. The study will provide insights into the role of the corpus callosum and the frontal lobe in color recognition.