1. In a between-subjects design, each subject receives __________.
2. A(n) ______ occurs when the effect of one variable, A, on another variable, X, depends on a third variable, B.
3. When factors such as age and sex, which are based upon characteristics of subjects, are used as a factor in a factorial design, __________.
4. An experiment with two independent variables, each of which has two levels, in which all
combinations of treatments are included, is called a(n) ________ design.
5. The design that best controls for individual differences between subjects, using the fewest number of subjects, is the __________.
6. The evidence for interactions can be seen most clearly in which of the following?
7. In a within-subjects design, the most likely threat to internal validity is __________.
8. A researcher investigates the effect of caffeine on problem solving speed. She administers either a placebo, 1, 2, or 5 mg of caffeine to subjects and measures the average time it takes them to solve three problems. This design contains _______________ factor(s) with __________ level(s).
9. The design that allows the researcher to test for interactions between variables is the __________.
10. In a within-subjects design ___________.
11. Experiments which test for interactions must include at a minimum __________.
12. In a __________ design, each subject receives all the treatments; in a _________ design, each subject receives only one treatment.
