1. 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 __________.
2. The __________ design is to quasi-experimental designs as the AB design is to single-case designs.
3. The Notel researchers evaluated the rival hypothesis that observed increases in children's aggression after the introduction of television were due to maturation by:
4. The student teacher waited a week after being introduced to her subjects before conducting her observation in order to __________.
5. The problem with face-to-face interviewing is __________.
6. A school psychologist compared the achievement scores of children who either had or had not been socially promoted. This study is using __________ data.
7. As the best approximation to the randomized control group design, field researchers often use:
8. The OXO design applied to group data is called the:
9. 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 __________.
10. In nonprobability sampling, the likelihood of selecting a particular subject is __________, while in probability sampling, the likelihood of selecting a particular subject is __________.
11. The threat to internal validity resulting from normal fluctuations in measures is called:
12. Statistical regression is a threat to the internal validity of a study whenever:
