Question 1

Which of the following experimental designs has the best internal validity?

Accepted Answer

A)   The one-group pretest-posttest design.
B)   The pretest-posttest control-group design.
C)   The time series design.
D)   The one-shot case study.E) B) and C)
F) None of the above

Question 2

Which one of the following is not a threat to the external validity of an experiment?

Accepted Answer

A)   Novelty and disruption effects
B)   Pretest sensitization effects
C)   Measurement of the dependent variable
D)   Experimental treatment diffusionE) A) and B)
F) None of the above

Question 3

In determining the population validity of an experiment, one needs to know the researchers'

Accepted Answer

A)   experimentally accessible population.
B)   target population.
C)   personological characteristics of the sample that might interact with the experimental treatment.
D)   all of the above.E) A) and B)
F) A) and C)

Question 4

How can randomization be achieved if individuals within intact groups cannot be randomly assigned to the experimental and control groups?

Accepted Answer

Select a sample of intact grou...

Question 5

a. What is the most important limitation of the one-group pretest-posttest design?
b. What kinds of variables can be studied by using this design?

Accepted Answer

a. Because there is no control group, th...

Question 6

A researcher is planning an experiment to test the effectiveness of the discussion method at the high school level. One teacher has agreed to use the discussion method in her class several times a week for a semester. Another teacher has agreed to teach the same content but without using the discussion method. The researcher will collect the following data: student scores on an achievement test and on a scale measuring attitudes toward the instruction. What recommendations can you offer to improve the representativeness of this experimental design?

Accepted Answer

a. Instead of one teacher each in the ex...

Question 7

An experiment that incorporates principles of representative design

Accepted Answer

A)   controls more rigorously for differential selection.
B)   takes more variables into account in the research design than an experiment that has a systematic design.
C)   controls more rigorously for experimenter effects.
D)   sacrifices population validity for increased internal validity.E) B) and C)
F) A) and D)

Exam 12: Experimental Research: Designs, Part 1

An experiment that incorporates principles of representative design

Correct Answer
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Correct Answer
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a. Instead of one teacher each in the ex...
View Answer

Which one of the following is not a threat to the external validity of an experiment?

Correct Answer
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a. What is the most important limitation of the one-group pretest-posttest design? b. What kinds of variables can be studied by using this design?

Correct Answer
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a. Because there is no control group, th...
View Answer

In determining the population validity of an experiment, one needs to know the researchers'

Correct Answer
verified

How can randomization be achieved if individuals within intact groups cannot be randomly assigned to the experimental and control groups?

Correct Answer
verified
Select a sample of intact grou...
View Answer

Which of the following experimental designs has the best internal validity?

Correct Answer
verified

Exam 12: Experimental Research: Designs, Part 1

An experiment that incorporates principles of representative design

Correct AnswerverifiedShow Answer

Correct Answerverifieda. Instead of one teacher each in the ex...View AnswerShow Answer

Which one of the following is not a threat to the external validity of an experiment?

Correct AnswerverifiedShow Answer

a. What is the most important limitation of the one-group pretest-posttest design? b. What kinds of variables can be studied by using this design?

Correct Answerverifieda. Because there is no control group, th...View AnswerShow Answer

In determining the population validity of an experiment, one needs to know the researchers'

Correct AnswerverifiedShow Answer

How can randomization be achieved if individuals within intact groups cannot be randomly assigned to the experimental and control groups?

Correct AnswerverifiedSelect a sample of intact grou...View AnswerShow Answer

Which of the following experimental designs has the best internal validity?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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a. Instead of one teacher each in the ex...
View Answer

Correct Answer
verified

Correct Answer
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a. Because there is no control group, th...
View Answer

Correct Answer
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Correct Answer
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Select a sample of intact grou...
View Answer

Correct Answer
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