1. A study contains two factors, X and Y, each with two levels (present, absent). The possible treatments are __________.
2. The statistical test used to analyze the factorial design is called the __________.
3. A(n) ______ occurs when the effect of one variable, A, on another variable, X, depends on a third variable, B.
4. When comparing line and bar charts, __________.
5. In a between-subjects design, each subject receives __________.
6. In a within-subjects design ___________.
7. In a between-subjects design, a possible threat to internal validity is _________.
8. When factors such as age and sex, which are based upon characteristics of subjects, are used as a factor in a factorial design, __________.
9. 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).
10. In a factorial design, subjects are assigned completely at random to one of the treatments; the design is a __________.
11. In a two-factor design, the number of F tests performed is:
12. In a factorial design, subjects are matched on IQ and then one of each pair is randomly assigned to one of the treatments; the design is a __________.
