SHORT DISCUSSION
1. Distinguish between a main effect and an interaction effect in a complex design.
2. Briefly describe the analyses that are done to interpret the results of complex designs when an interaction effect is present and when an interaction effect is not present.
MULTIPLE-CHOICE
3. An experiment was done in which college students and elderly people were tested on three different cognitive tasks (spatial ability, memory, and vocabulary). Thus, there were six conditions in the experiment. Which of the following best describes the overall design of the experiment?
A. longitudinal design
B. multivariable design
C. survey design
D. complex design
4. Which of the following effects occurs in a complex design when the effect of one independent variable differs depending on the level of a second independent variable?
A. main effect
B. combined effect
C. interaction effect
D. factorial effect
5. In a complex design experiment researchers found that younger and older people performed equally well on a memory task when they were tested in the morning, but the younger people performed better than the older people when they were tested in the afternoon. The different effect of age at the two times of day represents a(n):
A. main effect.
B. correlated effect.
C. comparison effect.
D. interaction effect.
6. In a complex factorial design described as a 2 X 4, there are:
A. two independent variables, each with four levels.
B. one independent variable with two levels and one independent variable with four levels.
C. four independent variables, each with two levels.
D. two independent variables and four dependent variables.
7. A researcher designs a 2 X 2 X 2 complex design in which the first independent variable uses a random groups design, the second independent variable uses a natural groups design, and the third independent variable uses a repeated measures design. The researcher wants to have 20 participants in each independent groups condition. How many participants will she need to recruit?
A. 160
B. 80
C. 40
D. 20
8. The number of conditions in a complex design described as a 2 X 3 is:
A. six.
B. five.
C. three.
D. two.
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