Question 1

Differential attrition can threaten the internal validity of a between-subjects experiment.

Accepted Answer

A) True 
 B)False

Question 2

A limitation of using matching rather than random assignment to form groups in a between-subjects experiment is that

Accepted Answer

A)  matching requires another measurement procedure.
B)  matching reduces error due to participant differences.
C)  matching is easier than randomization.
D)  matching eliminates any systematic relationship between participant characteristics and the treatment conditions.

Question 3

In a between-subjects experiment,when the participants in one group have characteristics that are noticeably different from those in another group,the _____ of the study is threatened.

Accepted Answer

A)  internal validity
B)  external validity
C)  reliability
D)  accuracy

Question 4

Between-subjects designs are often called repeated-measures designs.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following does not guarantee that a specific participant variable does not become a confounding variable?

Accepted Answer

A)  matching the variable across treatments
B)  randomizing the variable across treatment
C)  holding the variable constant
D)  all of the other options guarantee that the variable does not become a confounding variable

Question 6

The single-factor two-group design includes

Accepted Answer

A)  only two levels of one independent variable.
B)  a treatment and a control group.
C)  two dependent variables.
D)  multiple treatment and control groups.

Question 7

In a between-subjects design,you can increase the likelihood of finding a difference between the treatment conditions by

Accepted Answer

A)  including several independent variables in your experiment.
B)  including several dependent variables in your experiment.
C)  taking steps to minimize variance within groups.
D)  taking steps to maximize variance within groups.

Question 8

The primary limitation of a two-group design is that

Accepted Answer

A)  it is simple to interpret.
B)  it increases the chances of demonstrating a significant mean difference.
C)  it tends to reduce the differences between the groups.
D)  it may not provide a complete picture of the relationship between the variables.

Question 9

Resentful demoralization is a threat to the external validity of a between-subjects experiment.

Accepted Answer

A) True 
 B)False

Question 10

Describe the advantages and disadvantages of matching groups of participants in a between-subjects experiment.

Accepted Answer

The advantage of matching groups of part...

Question 11

Holding a variable constant prevents a variable from becoming a confound by

Accepted Answer

A)  eliminating the possibility that the variable will be substantially different from one group to another.
B)  reducing error.
C)  ensuring a nonbiased sample.
D)  increasing the differences between the groups.

Question 12

A between-subjects experiment comparing four treatment conditions produces 20 scores in each treatment condition.How many scores were obtained for each participant?

Accepted Answer

A)  1
B)  4
C)  20
D)  80

Question 13

In a between-subjects design

Accepted Answer

A)  only one score is obtained for each participant.
B)  at least two scores are obtained for each participant.
C)  one score is obtained for each treatment condition for each participant.
D)  each score represents multiple participants.

Question 14

Which of the following is not a risk when participants in one group have an opportunity to talk with participants in the other groups in a between-subjects experiment?

Accepted Answer

A)  resentful demoralization
B)  compensatory equalization
C)  diffusion
D)  differential attrition

Question 15

Explain the benefit of independent scores in a between-subjects design.

Accepted Answer

In a between-subjects design,each partic...

Question 16

In a between-subjects experiment,if the participants in one group are noticeably older than the participants in another group,then participant age is a confounding variable and threatens the internal validity of the experiment.

Accepted Answer

A) True 
 B)False

Question 17

For a between-subjects experiment,any factor that increases the variance within treatments also increases the likelihood of finding a significant difference between treatments.

Accepted Answer

A) True 
 B)False

Question 18

An advantage of between-subjects designs is that they require fewer participants than are typically needed for within-subjects designs.

Accepted Answer

A) True 
 B)False

Question 19

Because random assignment is likely to create groups of different sizes,researchers often employ

Accepted Answer

A)  restricted random assignment.
B)  matched random assignment.
C)  simple random assignment.
D)  sampling.

Question 20

In a between-subjects experiment,increasing the variance within treatments increases the likelihood of finding significant differences between treatments.

Accepted Answer

A) True 
 B)False

Exam 8: Experimental Designs: Between-Subjects Design

A between-subjects experiment comparing four treatment conditions produces 20 scores in each treatment condition.How many scores were obtained for each participant?

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Differential attrition can threaten the internal validity of a between-subjects experiment.

Correct AnswerverifiedShow Answer

A limitation of using matching rather than random assignment to form groups in a between-subjects experiment is that

Correct AnswerverifiedShow Answer

For a between-subjects experiment,any factor that increases the variance within treatments also increases the likelihood of finding a significant difference between treatments.

Correct AnswerverifiedShow Answer

In a between-subjects design

Correct AnswerverifiedShow Answer

Because random assignment is likely to create groups of different sizes,researchers often employ

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Resentful demoralization is a threat to the external validity of a between-subjects experiment.

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In a between-subjects experiment,when the participants in one group have characteristics that are noticeably different from those in another group,the _____ of the study is threatened.

Correct AnswerverifiedShow Answer

In a between-subjects experiment,if the participants in one group are noticeably older than the participants in another group,then participant age is a confounding variable and threatens the internal validity of the experiment.

Correct AnswerverifiedShow Answer

Which of the following does not guarantee that a specific participant variable does not become a confounding variable?

Correct AnswerverifiedShow Answer

Describe the advantages and disadvantages of matching groups of participants in a between-subjects experiment.

Correct AnswerverifiedThe advantage of matching groups of part...View AnswerShow Answer

In a between-subjects experiment,increasing the variance within treatments increases the likelihood of finding significant differences between treatments.

Correct AnswerverifiedShow Answer

Holding a variable constant prevents a variable from becoming a confound by

Correct AnswerverifiedShow Answer

An advantage of between-subjects designs is that they require fewer participants than are typically needed for within-subjects designs.

Correct AnswerverifiedShow Answer

In a between-subjects design,you can increase the likelihood of finding a difference between the treatment conditions by

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The primary limitation of a two-group design is that

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Explain the benefit of independent scores in a between-subjects design.

Correct AnswerverifiedIn a between-subjects design,each partic...View AnswerShow Answer

Between-subjects designs are often called repeated-measures designs.

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The single-factor two-group design includes

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Which of the following is not a risk when participants in one group have an opportunity to talk with participants in the other groups in a between-subjects experiment?

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The advantage of matching groups of part...
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In a between-subjects design,each partic...
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