Select Questions

Chapter 8

1. Factorial designs are used when the researcher wishes to measure the effect of an independent variable __________.

on a dependent variable

as a function of the effect of at least one other dependent variable

on a dependent variable as a function of the effect of at least one other independent variable

on several dependent variables

2. In the two-factor design shown in the summary table below, there was/were __________ level(s) of Factor A, Drug.
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

3. When comparing line and bar charts, __________.

tables are better than either the line or bar chart at showing interactions

both are equally good at displaying study results

neither is as good as a table

the line chart is superior to the bar chart at showing interactions

4. The degrees of freedom associated with the main effects and interaction in an analysis of variance depend on:

the size of the study.

the degree of experimental control that is achieved.

the context of the experiment.

the power of the statistical test.

5. 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

6. Counterbalancing is a technique that can be used for:

converting a between-subjects design to a within-subjects design.

dealing with subject factors.

balancing order effects.

testing interactions.

7. Experiments which test for interactions must include at a minimum __________.

two independent variables and one dependent variable

one independent variable and one dependent variable

two independent variables and two dependent variables

one independent variable and two dependent variables

8. To evaluate the possibility of an interaction between Factors A and B:

comparisons must be made of the effects of A at different levels of B.

the effects of A at each level of B are subtracted.

none of the alternatives are correct

the values for the effect of B at each level of A are multiplied.

9. A(n) __________ occurs when the effect of one variable, X, on another variable, Y, depends upon a third variable, Z.

main effect of X

main effect of X and an interaction between X and Y

main effect of Z

interaction

10. In an experimental design, subjects receive all treatments, according to a predetermined order. The design is a __________ design.

completely randomized

Latin square

randomized blocks

between-subjects

11. In a two-factor design, the number of F tests performed is:

12. In a __________ design, each subject receives all the treatments; in a _________ design, each subject receives only one treatment.

within-subjects; between-subjects

factorial; nonfactorial

between-subjects; within-subjects

nonfactorial; factorial