Question 1

The primary limitation of a two-group design is that it ____.

Accepted Answer

A)  ​is extremely difficult to interpret
B)  ​decreases the chances of demonstrating a significant mean difference
C)  tends to reduce the differences between the groups
D)  ​may not provide a complete picture of the relationship between the variables

Question 2

In a between-subjects design,the separate groups must be as ____.​

Accepted Answer

A)  ​similar in participant characteristics as possible
B)  ​different in all environmental variables as possible
C)  similar in treatment conditions as possible
D)  ​similar on the dependent variable measures as possible.

Question 3

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 4

Differential attrition refers to ____.

Accepted Answer

A)  ​differences in one group of participants from another group
B)  ​differences in the number of withdrawals among experimental groups
C)  the spreading of treatment effects from the experimental to the control group
D)  ​the demands of the untreated group to receive equal treatment

Question 5

In an experiment examining the effects of size of plate on amount of food eaten,one group of participants is measured after eating food on 12-inch plates.Another group of participants is measured after eating food on 10-inch plates.This is an example of a ____ design.​

Accepted Answer

A)  ​single-subjects
B)  ​between-subjects
C)  within-subjects
D)  ​matched groups

Question 6

An experiment that uses a different group of participants for each treatment condition is called a ____ design.​

Accepted Answer

A)  ​single-subjects
B)  ​between-subjects
C)  within-subject
D)  ​matched groups

Question 7

In a between-subjects experiment,when the process of assigning participants to the treatment conditions produces groups with different characteristics,the ____of the study is threatened.​

Accepted Answer

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

Question 8

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

Accepted Answer

​In a between-subjects design,each parti...

Question 9

A limitation of a single-factor multiple group design is that the ____.

Accepted Answer

A)  ​mean differences between the groups become smaller as more groups are used
B)  ​interpretation is too simplistic
C)  chances of demonstrating a significant mean difference are increased
D)  ​complete picture of the relationship between the variables cannot be seen

Question 10

Why is random assignment used in between-subjects experimental designs?​

Accepted Answer

A)  ​to hold participant characteristics constant
B)  ​to ensure a nonbiased sample
C)  to ensure anonymity of the research participants
D)  ​to eliminate systematic differences between the groups

Question 11

In a between-subjects design,holding constant a participant characteristic,such as age or gender,is one way to ____.

Accepted Answer

A)  ​reduce the variance within treatments
B)  ​maximize the variance within treatments
C)  ​increase individual differences.
D)  ​increase sample size

Question 12

Validity is threatened in a between-subjects design when participants in one group have an opportunity to talk with participants in the other.

Accepted Answer

A) True 
 B)False

Question 13

Increasing variance within groups ____ the likelihood of finding a difference between the treatment conditions.

Accepted Answer

A)  ​increases
B)  ​decreases
C)  does not affect
D)  ​increase, then decreases

Question 14

Randomizing a variable across treatments guarantees that the variable cannot become a confounding variable.​

Accepted Answer

A) True 
 B)False

Question 15

When comparing means in a single-factor multiple group design,which statistical analysis is most appropriate?

Accepted Answer

A)  ​independent-measures t test
B)  ​repeated-measures t test 
C)  single-factor analysis of variance
D)  ​chi-square test for independence

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

Holding a variable constant prevents a participant characteristic from becoming a confound by ____.

Accepted Answer

A)  ​eliminating variability in that characteristic
B)  ​reducing error
C)  ensuring a nonbiased sample
D)  ​increasing the differences between the groups

Question 18

In a between-subjects design,to compare proportions between groups,an independent-measures t test is appropriate.​

Accepted Answer

A) True 
 B)False

Question 19

Compared to within-subjects designs,between-subjects designs require relatively ____.

Accepted Answer

A)  ​larger numbers of participants
B)  ​smaller numbers of participants
C)  less control of individual difference
D)  ​more concern for practice effects

Question 20

Assignment bias can threaten the internal validity of between-subjects experiments.​

Accepted Answer

A) True 
 B)False

Exam 8: Experimental Designs: Between Subjects Design.

In a between-subjects design,holding constant a participant characteristic,such as age or gender,is one way to ____.

Correct AnswerverifiedShow Answer

Why is random assignment used in between-subjects experimental designs?​

Correct AnswerverifiedShow Answer

In a between-subjects design,to compare proportions between groups,an independent-measures t test is appropriate.​

Correct AnswerverifiedShow Answer

Assignment bias can threaten the internal validity of between-subjects experiments.​

Correct AnswerverifiedShow Answer

Increasing variance within groups ____ the likelihood of finding a difference between the treatment conditions.

Correct AnswerverifiedShow Answer

In a between-subjects design,the separate groups must be as ____.​

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

An experiment that uses a different group of participants for each treatment condition is called a ____ design.​

Correct AnswerverifiedShow Answer

Randomizing a variable across treatments guarantees that the variable cannot become a confounding variable.​

Correct AnswerverifiedShow Answer

A limitation of a single-factor multiple group design is that the ____.

Correct AnswerverifiedShow Answer

Compared to within-subjects designs,between-subjects designs require relatively ____.

Correct AnswerverifiedShow Answer

When comparing means in a single-factor multiple group design,which statistical analysis is most appropriate?

Correct AnswerverifiedShow Answer

The primary limitation of a two-group design is that it ____.

Correct AnswerverifiedShow Answer

In a between-subjects experiment,when the process of assigning participants to the treatment conditions produces groups with different characteristics,the ____of the study is threatened.​

Correct AnswerverifiedShow Answer

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

Correct Answerverified​In a between-subjects design,each parti...View AnswerShow 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 an experiment examining the effects of size of plate on amount of food eaten,one group of participants is measured after eating food on 12-inch plates.Another group of participants is measured after eating food on 10-inch plates.This is an example of a ____ design.​

Correct AnswerverifiedShow Answer

Validity is threatened in a between-subjects design when participants in one group have an opportunity to talk with participants in the other.

Correct AnswerverifiedShow Answer

Holding a variable constant prevents a participant characteristic from becoming a confound by ____.

Correct AnswerverifiedShow Answer

Differential attrition refers to ____.

Correct AnswerverifiedShow Answer

Correct Answer
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Why is random assignment used in between-subjects experimental designs?

Correct Answer
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In a between-subjects design,to compare proportions between groups,an independent-measures t test is appropriate.

Correct Answer
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Assignment bias can threaten the internal validity of between-subjects experiments.

Correct Answer
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In a between-subjects design,the separate groups must be as ____.

Correct Answer
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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 Answer
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An experiment that uses a different group of participants for each treatment condition is called a ____ design.

Correct Answer
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Randomizing a variable across treatments guarantees that the variable cannot become a confounding variable.

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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In a between-subjects experiment,when the process of assigning participants to the treatment conditions produces groups with different characteristics,the ____of the study is threatened.

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

Correct Answer
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In a between-subjects design,each parti...
View Answer

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

Correct Answer
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In an experiment examining the effects of size of plate on amount of food eaten,one group of participants is measured after eating food on 12-inch plates.Another group of participants is measured after eating food on 10-inch plates.This is an example of a ____ design.

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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