After reading this chapter, you will be able to

4.1 Explain how scientific theories are generated.
4.2 Explain how scientists test hypotheses.
4.3 Describe the differences between correlational and experimental studies.
4.4 Describe the methods that scientists have for studying the role of brain structures in behavior.
4.5 Compare the methods that scientists use to investigate the structure and function of the brain.
4.6 Summarize the ethical protections that are in place for human participants and research animals.
4.7 Examine the ethical concerns that have been raised about stem cell and gene therapy research.