Review Questions 1. What is naturalistic observation? How does a researcher collect data when conducting naturalistic observation research? 2. Why are the data in naturalistic observation research primarily qualitative? 3. Distinguish between participant and nonparticipant observation; between concealed and nonconcealed observation. 4. What is systematic observation? Why are the data from systematic observation primarily quantitative? 5. What is coding system? What are some important considerations when developing a coding system? 6. What is a case study? When are studies used? What is a psychobiography? 7. What is archival research? What are the major sources of archival data? 8. What is content analysis?