Select Questions

Chapter 8

1. In a two-factor design, the number of F tests performed is:
        
2. When factors such as age and sex, which are based upon characteristics of subjects, are used as a factor in a factorial design, __________.
        
3. In the analysis of the two-factor design shown in the summary table below, which F test(s) was/were statistically significant?
Table
Analysis of Variance
Summary Table for Depression Scores
Source              df       F
A = Drug Th         1      1.86
B = Cog Beh Th     1     12.23*
A x B                  1       2.03
Error                30
* p < .05
        
4. Experiments which test for interactions must include at a minimum __________.
        
5. 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 _________.
        
6. The degrees of freedom associated with the main effects and interaction in an analysis of variance depend on:
        
7. In Hall and Kataria's study evaluating different treatments for attention deficit hyperactive disorder, the children were tested on a delayed response task both when they were taking Ritalin and when they were not. A variable such as this involving repeated testing of the same subjects is called:
        
8. Factorial designs are used when the researcher wishes to measure the effect of an independent variable __________.
        
9. In a within-subjects design, the most likely threat to internal validity is __________.
        
10. In a between-subjects design, a possible threat to internal validity is _________.
        
11. The evidence for interactions can be seen most clearly in which of the following?
        
12. In an experimental design, subjects receive all treatments, according to a predetermined order. The design is a __________ design.