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Homework answers / question archive / Question 1)   Psychological researchers often use college students as participants because       Answers: the use of college students makes it possible to obtain a truly random sample   findings about their complex behaviors almost always generalize well to the broader population     they are readily available   they follow experimental directions well       Question 2         According to research on volunteer characteristics reported by Rosenthal and Rosnow (1975), we have maximum confidence that       Answers: volunteers for research are less educated than nonvolunteers   nonvolunteers have a greater need for approval than volunteers     volunteers are more intelligent than nonvolunteers   volunteers are less social than nonvolunteers       Question 3         We increase power in a research design when we have       Answers:   small differences within conditions   large error variance   large differences within conditions   extraneous variables between conditions       Question 4         Jeff randomly assigns participants to serve in each condition of his study

Question 1)   Psychological researchers often use college students as participants because       Answers: the use of college students makes it possible to obtain a truly random sample   findings about their complex behaviors almost always generalize well to the broader population     they are readily available   they follow experimental directions well       Question 2         According to research on volunteer characteristics reported by Rosenthal and Rosnow (1975), we have maximum confidence that       Answers: volunteers for research are less educated than nonvolunteers   nonvolunteers have a greater need for approval than volunteers     volunteers are more intelligent than nonvolunteers   volunteers are less social than nonvolunteers       Question 3         We increase power in a research design when we have       Answers:   small differences within conditions   large error variance   large differences within conditions   extraneous variables between conditions       Question 4         Jeff randomly assigns participants to serve in each condition of his study

Physics

Question 1)

 

Psychological researchers often use college students as participants because

     

Answers:

the use of college students makes it possible to obtain a truly random sample

 

findings about their complex behaviors almost always generalize well to the broader population

 

 

they are readily available

 

they follow experimental directions well

     
  • Question 2

 

   
 

According to research on volunteer characteristics reported by Rosenthal and Rosnow (1975), we have maximum confidence that

     

Answers:

volunteers for research are less educated than nonvolunteers

 

nonvolunteers have a greater need for approval than volunteers

 

 

volunteers are more intelligent than nonvolunteers

 

volunteers are less social than nonvolunteers

     
  • Question 3

 

   
 

We increase power in a research design when we have

     

Answers:

 

small differences within conditions

 

large error variance

 

large differences within conditions

 

extraneous variables between conditions

     
  • Question 4

 

   
 

Jeff randomly assigns participants to serve in each condition of his study. Each participant serves in only one condition, and Jeff uses no other procedure to control for the effects of participant variables. What kind of design is he using?

     

Answers:

 

Between-subjects

 

Matched-groups

 

Repeated-measures

 

correlational

     
  • Question 5

 

   
 

Which of the following is a potential problem with using a matched groups design?

     

Answers:

Experimental realism is decreased

 

In every condition, participants have similar scores on the variable controlled

 

 

Several individuals may need to be pre-tested, potentially limiting the sample size available

 

Error variance is decreased

     
  • Question 6

 

   
 

What conducting a study, if we don't know which participant variables to control or if it is impossible to control them, a _______ design should be used.

     

Answers:

counterbalancing

 

matched-pairs design

 

between-subjects design

 

 

within-subjects design

     
  • Question 7

 

   
 

Michael is using a repeated-measures design. However, he is worried that participants' continuing experiences between measurements could change their responses.  In other words, Michael is concerned about

     

Answers:

 

history

 

maturation

 

participant mortality

 

order effects

     
  • Question 8

 

   
 

Which of these is not a threat to internal validity in repeated-measures designs?

     

Answers:

History

 

Participant mortality

 

Order effects

 

 

Lack of random assignment

     
  • Question 9

 

   
 

Which of these research techniques would not be used to control for order effects in a repeated-measures desing?

     

Answers:

 

Double-blind procedure

 

Randomization

 

Complete counterbalancing

 

Partial counterbalancing

     
  • Question 10

 

   
 

Suppose that you discovered that you had nonsyummetrical carryover effects in your study.  What should you do?

     

Answers:

Us a repeated-measures design

 

Increase N by obtaining more participants

 

Use Latin-square counterbalancing

 

 

Use a between-subjects design

     

 

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