1. __________ data are data collected previously by people not directly associated with the current research.
2. Although field studies avoid some limitations of laboratory research, such studies have the disadvantage(s) of :
3. When well done, __________ is NOT a major source of error in surveys.
4. The pretreatment observations in the interrupted time-series design are like the in a single-case experiment.
5. Mail surveys are associated with __________ while face-to-face surveys are associated with __________.
6. The accuracy of estimating population values from a sample is a function of all of the following EXCEPT:
7. The use of a nonequivalent control group is an attempt to control for __________.
8. The student teacher waited a week after being introduced to her subjects before conducting her observation in order to __________.
9. An elaborate, sometimes pictorial, system for classifying the behavior of a species is called:
10. A researcher is interested in studying drug use in adolescence. He gathers a list of all high schools in the nation. He randomly selects 500 schools. From these schools, he randomly selects 3000 homerooms. From each homeroom, he selects 20 students using simple random sampling. His sampling process is an example of __________.
11. Which of the following is an example of probability sampling?
12. A graduate student was observing the depressive behavior of a patient on the unit. She was kept unaware of when the patient started treatment. Such a control to reduce observer bias is called __________.
