Question 1

Which has the effect of reducing variance?

Accepted Answer

A)  ​random assignment
B)  ​matched assignment
C)  holding variables constant
D)  ​random selection

Question 2

Researchers typically try to ____.

Accepted Answer

A)  ​increase the differences between treatments and decrease the variance within treatments
B)  ​decrease the differences between treatments and increase the variance within treatments
C)  increase the differences between treatments and increase the variance within treatments
D)  ​decrease the differences between treatments and decrease the variance within treatments

Question 3

An advantage of holding a variable constant rather than using random assignment to form your groups is that holding a variable constant ____.

Accepted Answer

A)  ​reduces error due to participant differences
B)  ​is easier than randomization
C)  prevents confounding
D)  ​ensures a nonbiased sample

Question 4

An advantage of a between-subject design is that ____.​

Accepted Answer

A)  ​scores are influenced by practice effects
B)  ​scores are influenced by fatigue
C)  each score is independent of all the other scores
D)  ​they require large numbers of participants

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

Create an example of a between-subjects experiment.Identify the independent and dependent variables and briefly describe the experiment.Indicate the number of levels of the independent variable and identify them.​

Accepted Answer

​Student Answers will vary but should al...

Question 7

In a between-subjects experimental design,individual differences can become a confounding variable.

Accepted Answer

A) True 
 B)False

Question 8

Holding a participant characteristic (such as age or gender) constant strengthens ____ and?weakens ____.

Accepted Answer

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

Question 9

In a between-subjects experiment,one way to reduce the variance within treatments is to create more homogeneous groups by holding constant a participant characteristic such as age or gender.​

Accepted Answer

A) True 
 B)False

Question 10

Which statement best characterizes a between-subjects experimental design?

Accepted Answer

A)  ​Participants are randomly selected from two different populations.
B)  ​Each participant is assigned to one condition of the experiment.
C)  Each participant is assigned to every condition of the experiment.
D)  ​Participants are assigned to a random number of conditions.

Question 11

In a between-subjects design,large individual differences can produce ____.

Accepted Answer

A)  ​large between-treatment differences, making it easier to see real treatment effects
B)  ​small within-treatment variance, making it easier to see real treatment effects
C)  large within-treatment variance, making it difficult to see real treatment effects
D)  ​small between-treatment difference, making it difficult to see real treatment effects

Question 12

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 13

When ____ occurs in a between-subjects experiment,it is impossible to determine whether differences between groups are caused by the treatments or by participant characteristics.

Accepted Answer

A)  ​fatigue
B)  ​practice
C)  assignment bias
D)  ​resentful demoralization

Question 14

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.A week later,the same 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 15

A disadvantage of holding a variable constant is that it limits an experiment's external validity.​

Accepted Answer

A) True 
 B)False

Question 16

One advantage of a between-subjects design is that each score is completely independent of the other scores in the data.

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

What is the most common statistical analysis for a single-factor multiple-group design?​

Accepted Answer

A)  ​ANOVA
B)  ​independent-measures t test
C)  repeated-measures t test
D)  ​regression

Question 19

Compensatory equalization occurs when ____.

Accepted Answer

A)  ​an untreated group learns of the treatment received by another group and then works extra hard to show that they can perform just as well as individuals receiving the treatment
B)  ​an untreated group learns of the treatment received by another group and then demands the same treatment
C)  an untreated group learns of the treatment received by another group and then becomes less motivated
D)  ​participants withdraw from a research study before it is completed

Question 20

A between-subjects experiment comparing three treatments requires three separate groups of participants.​

Accepted Answer

A) True 
 B)False

Exam 8: Experimental Designs: Between Subjects Design.

Researchers typically try to ____.

Correct AnswerverifiedShow Answer

Holding a participant characteristic (such as age or gender) constant strengthens ____ and?weakens ____.

Correct AnswerverifiedShow Answer

In a between-subjects experimental design,individual differences can become a confounding variable.

Correct AnswerverifiedShow Answer

What is the most common statistical analysis for a single-factor multiple-group design?​

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which statement best characterizes a between-subjects experimental design?

Correct AnswerverifiedShow Answer

Which has the effect of reducing variance?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

When ____ occurs in a between-subjects experiment,it is impossible to determine whether differences between groups are caused by the treatments or by participant characteristics.

Correct AnswerverifiedShow Answer

In a between-subjects design,large individual differences can produce ____.

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.A week later,the same group of participants is measured after eating food on 10 inch plates.This is an example of a ____ design.​

Correct AnswerverifiedShow Answer

A disadvantage of holding a variable constant is that it limits an experiment's external validity.​

Correct AnswerverifiedShow Answer

Compensatory equalization occurs when ____.

Correct AnswerverifiedShow Answer

Create an example of a between-subjects experiment.Identify the independent and dependent variables and briefly describe the experiment.Indicate the number of levels of the independent variable and identify them.​

Correct Answerverified​Student Answers will vary but should al...View AnswerShow Answer

A between-subjects experiment comparing three treatments requires three separate groups of participants.​

Correct AnswerverifiedShow Answer

An advantage of holding a variable constant rather than using random assignment to form your groups is that holding a variable constant ____.

Correct AnswerverifiedShow Answer

One advantage of a between-subjects design is that each score is completely independent of the other scores in the data.

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 experiment,one way to reduce the variance within treatments is to create more homogeneous groups by holding constant a participant characteristic such as age or gender.​

Correct AnswerverifiedShow Answer

An advantage of a between-subject design is that ____.​

Correct AnswerverifiedShow Answer

Correct Answer
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Holding a participant characteristic (such as age or gender) constant strengthens and?weakens .

Correct Answer
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Correct Answer
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What is the most common statistical analysis for a single-factor multiple-group design?

Correct Answer
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Because random assignment is likely to create groups of different sizes,researchers often employ ____.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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.A week later,the same group of participants is measured after eating food on 10 inch plates.This is an example of a ____ design.

Correct Answer
verified

A disadvantage of holding a variable constant is that it limits an experiment's external validity.

Correct Answer
verified

Correct Answer
verified

Create an example of a between-subjects experiment.Identify the independent and dependent variables and briefly describe the experiment.Indicate the number of levels of the independent variable and identify them.

Correct Answer
verified
Student Answers will vary but should al...
View Answer

A between-subjects experiment comparing three treatments requires three separate groups of participants.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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 Answer
verified

In a between-subjects experiment,one way to reduce the variance within treatments is to create more homogeneous groups by holding constant a participant characteristic such as age or gender.

Correct Answer
verified

An advantage of a between-subject design is that ____.

Correct Answer
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