12. What some difficulties that scientists have had in categorizing : 1991677
12. What are some difficulties that scientists have had in categorizing people by race and in defining race?
13. What role as the U.S. government had in the determination of races? Why can this be important in scientific research?
14. What problems regarding culture and diversity beset research in the social and behavioral sciences? Why do these problems occur? Why are the problems less troublesome in the physical and natural sciences?