Select Questions

Chapter 8

1. When comparing line and bar charts, __________.

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

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

both are equally good at displaying study results

neither is as good as a table

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

between-subjects

randomized blocks

completely randomized

Latin square

3. A researcher investigates the effect of caffeine on problem solving speed. She administers either a placebo, 1, 2, or 5 mg of caffeine to subjects and measures the average time it takes them to solve three problems. This design contains _______________ factor(s) with __________ level(s).

one, three

one, four

four, three

four, one

4. In a factorial design, subjects are assigned completely at random to one of the treatments; the design is a __________.

randomized blocks design

completely randomized design

within-subjects design

Latin square design

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

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

study results are easy to interpret

subjects may be assigned in a completely random fashion

results will probably not generalize

6. The evidence for interactions can be seen most clearly in which of the following?

a table of group means

a bar chart

a line chart

a scatterplot

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

regression

main effect

anomaly

interaction

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

none of the alternatives are correct

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

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

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

only one treatment order

all treatments

only one treatment

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

dealing with subject factors.

testing interactions.

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

balancing order effects.

11. In a factorial design, subjects are matched on IQ and then one of each pair is randomly assigned to one of the treatments; the design is a __________.

repeated measures design

completely randomized design

Latin square design

randomized blocks design

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