Select Questions

Chapter 8

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

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

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

none of the alternatives are correct

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

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

3. In a between-subjects design, each subject receives __________.

only one treatment order

only one treatment

all treatments

only one treatment at one time and other treatments at later times to prevent carryover effects

4. Factorial designs are used when the researcher wishes to measure the effect of an independent 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 a dependent variable

on several dependent variables

5. A study contains two factors, X and Y, each with two levels (present, absent). The possible treatments are __________.

X1Y1, + X1Y2, + X2Y1, + X2Y2

X1Y1, + X2Y2

X1Y1, + X1Y2, + X2Y1

X and Y

6. A(n) ______ occurs when the effect of one variable, A, on another variable, X, depends on a third variable, B.

interaction

main effect

anomaly

regression

7. In a within-subjects design, the most likely threat to internal validity is __________.

instrumentation

testing

history

statistical regression

8. In a within-subjects design ___________.

each subject receives all treatments

there are at least two factors and at least one dependent variable

each subject receives only one treatment

there are two factors and at least one dependent variable

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

the power of the statistical test.

the context of the experiment.

the degree of experimental control that is achieved.

the size of the study.

10. 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

11. When factors such as age and sex, which are based upon characteristics of subjects, are used as a factor in a factorial design, __________.

subjects may be assigned in a completely random fashion

results will probably not generalize

study results are easy to interpret

it may be because it is not feasible or ethical to manipulate that factor (e.g., stress).

12. 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