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

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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