Select Questions

Chapter 8

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

completely randomized

between-subjects

Latin square

randomized blocks

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

testing interactions.

balancing order effects.

dealing with subject factors.

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

3. 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 several dependent variables

on a dependent variable

4. 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, one

four, three

5. The design that allows the researcher to test for interactions between variables is the __________.

between-subjects design

Latin square design

factorial design

within-subjects design

6. An experiment with two independent variables, each of which has two levels, in which all combinations of treatments are included, is called a(n) ________ design.

2x2 factorial

interaction

multiple factor

two-way factorial

7. 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

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.

none of the alternatives are correct

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

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

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

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

a line chart

a table of group means

a bar chart

a scatterplot

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

all treatments

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

only one treatment order

only one treatment

12. 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