EDF 5481
Summer 2013
Quiz #3
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question and place it on the space
to the left of the item number.
_a.___
__c.__
____d.
__d.__
__b.__
1. Which variable does the experimental researcher manipulate?
a. Independent
b. Attribute
c. Extraneous
d. Dependent
2. Which would be the least appropriate way to assign subjects to experimental groups?
a. Rolling a die
b. Flipping a coin
c. Teacher assignment
d. Using a table of random numbers.
3. In order to apply the law of the single significant independent variable to a study, a researcher should
a. choose a single test for the dependent variable.
b. determine which single test is most related to the independent variable by using
several tests as possible dependent variable.
c. determine which single variable makes the most difference by varying the
independent variable in many different ways.
d. establish two groups that are as alike as possible, except one is exposed to the
independent variable while the other is not.
4. A researcher wants to determine the cause of intoxication. On successive days, he consumed large
quantities of scotch and water, bourbon and water, and vodka and water. Becoming very intoxicated
in each case, he concluded, "It's the water that makes one drunk." The researcher should have
consumed pure water on one of his test days. The water alone test would be called a
a. double blind.
b. hypothesis.
c. prediction.
d. control.
5. Any type of attention may lead the subjects in the experimental group to respond in an
other-than-normal manner. This phenomenon is called
a. closure.
b. Hawthorne effect.
c. Premack principle.
d. John Henry effect
e. perception effect.
_a.___
____a.
__d.__
__a.__
__c__
6. Failure to control history and maturation is a definite weakness.
a. One-group, pretest-posttest design
b. Randomized subjects, posttest only, control-group design
c. Randomized subjects, pretest-posttest design control-group
d. Randomized Solomon four-group design
e. Counterbalanced design
7. In a randomized subjects pretest-posttest control group design, results might best be analyzed
through
a. ANCOVA.
b. ANOVA.
c. change scores.
d. t tests.
8. The Solomon three- and four-group designs were developed in order to control the threat of
a. differential measurement.
b. history.
c. maturation.
d. pretest sensitization.
9. The main disadvantage of a counterbalanced design is the lack of control for
a. carry-over effect of treatment.
b. internal validity.
c. preexisting differences.
d. pretest sensitization.
10. The term "confounding" refers to the presence of
a. a variable which is controlled and does not affect the outcome of a study.
b. two independent variables in a study.
c. a variable that is not controlled which affects the outcome of a study.
d. two dependent variables in a study.
EDF 5481
Summer 2013
Answer Section
Quiz #3
MULTIPLE CHOICE
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10.
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A
C
D
D
B
A
A
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A
C