1. 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 __________.
2. To evaluate the possibility of an interaction between Factors A and B:
3. The evidence for interactions can be seen most clearly in which of the following?
4. A(n) ______ occurs when the effect of one variable, A, on another variable, X, depends on a third variable, B.
5. Most people thrive on a diet containing phenylalanine; only the rare people with
phenylketonuria suffer brain damage because of it. This is an example of a(n):
6. A(n) __________ occurs when the effect of one variable, X, on another variable, Y, depends upon a third variable, Z.
7. When factors such as age and sex, which are based upon characteristics of subjects, are used as a factor in a factorial design, __________.
8. Researchers have investigated the effect of exercise on depression. They have found that exercise decreases "feeling blue" in unipolar depressives but has no effect upon those suffering from seasonal affective disorder. The finding, that the effects of exercise depends upon diagnostic category, is an example of _________.
9. In a factorial design, subjects are assigned completely at random to one of the treatments; the design is a __________.
10. In a two-factor design, the number of F tests performed is:
11. When comparing line and bar charts, __________.
12. In an experimental design, subjects receive all treatments, according to a predetermined order. The design is a __________ design.
