Select Questions

Chapter 8

1. Experiments which test for interactions must include at a minimum __________.
        
2. A __________ design is a design with two or more independent variables, in which the complete set of treatments is defined by the product of the levels of the independent variables.
        
3. See the summary table below. In the analysis of this two-factor design, __________ F test(s) was/were computed.
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. In a between-subjects design, each subject receives __________.
        
5. 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:
        
6. In a factorial design, subjects are assigned completely at random to one of the treatments; the design is a __________.
        
7. Factorial designs are used when the researcher wishes to measure the effect of an independent variable __________.
        
8. The statistical test used to analyze the factorial design is called the __________.
        
9. A study contains two factors, X and Y, each with two levels (present, absent). The possible treatments are __________.
        
10. To evaluate the possibility of an interaction between Factors A and B:
        
11. 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 _________.
        
12. In a within-subjects design ___________.