Final answer:
The capacity to draw different shapes simultaneously with each hand indicates a person whose corpus callosum has been cut, resulting in a split-brain condition where the hemispheres operate independently.
Step-by-step explanation:
The ability to simultaneously draw one shape with the right hand and a different shape with the left hand is most characteristic of those whose corpus callosum has been cut. Severing the corpus callosum is a treatment that may be used to control severe epilepsy, leading to a condition known as split-brain. This disconnection allows the two hemispheres to operate independently, which can result in the ability to perform dual tasks that require separate actions by each hemisphere.
Patients with a cut corpus callosum can demonstrate behaviors such as not being able to verbally identify an object seen in the left visual field but being able to draw it with their left hand because the information is processed in the nonverbal right hemisphere. Moreover, these patients may exhibit peculiar behaviors like only using their right hand when asked to describe items found by feeling in their pockets, ignoring the left hand entirely.