Final answer:
Barton's study supports the idea that prosopagnosia is face specific due to underdevelopment of a specific brain region responsible for facial recognition.
Step-by-step explanation:
Prosopagnosia, also known as face blindness, is a condition where individuals have difficulty recognizing and distinguishing faces. Barton's study supports the notion that prosopagnosia is face specific because it found that a specific region of the brain called the anterior fusiform gyrus of the temporal lobe, which is responsible for facial recognition, is often underdeveloped in people with prosopagnosia. This suggests that there is a specific neural circuitry involved in facial recognition that is affected in individuals with prosopagnosia.