The conclusion was there are very few differences in the rate of psychiatric disorders.
Explanation:
The Epidemiological Capture Area Project (ECA) was a research program done in 1977 that sought to study the incidence of mental disorders among ethnic groups and the degree of need for treatment for these disorders. At the end of this research the overall conclusion of the Epidemiological Capture Area Project (ACE) was that although there were some differences between ethnic groups in specific disorder rates, there are very few differences in the rate of psychiatric disorders.
Answer: They can help keep you from getting distracted while you're driving, they can act as a second eye to look for any potential dangers, and they can switch places with you if needed.