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How many attributes does a dichotomous variable have?


A) 0
B) 1
C) 2
D) 4

E) C) and D)
F) B) and D)

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In case-oriented research a large number of cases are examined in order to understand a small number of variables.

A) True
B) False

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What technique can be used to help reduce the threat to experimental mortality?


A) increasing the sample size
B) decreasing the sample size
C) shorten the time between the pretest and the posttest
D) select only subjects who are female

E) None of the above
F) All of the above

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Experimentation is best suited for hypothesis testing in:


A) explanatory studies
B) evaluation studies
C) physical studies
D) both explanatory and evaluation studies

E) None of the above
F) A) and B)

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D

In the case where the experimental groups and the control groups are not equivalent,which of the following should not be used to address this issue?


A) proceed with the experiment because you can address the issues during your statistical analysis
B) match the groups on important variables
C) use comparison groups instead of control groups
D) match groups on any variables that are significant for the fluctuation in the dependent variable

E) A) and B)
F) B) and C)

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When using a nonequivalent-groups design the researcher will handle subject assignment to groups by:


A) random assignment to experimental and control groups
B) allowing subjects to pick which group they want to be in
C) matching subjects in the experimental group to those in the comparison group.
D) assignment by convenience

E) C) and D)
F) A) and C)

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Shortening the time between pretest and posttest or perhaps even offering cash payments to participants in an experiment are techniques that may be used to:


A) limit diffusion
B) decrease experimental mortality
C) decrease the effects of instrumentation
D) control threats to testing

E) All of the above
F) C) and D)

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Sometimes it is not possible to separate subjects from experimental and control groups and the result is that they may discuss the research.What is the threat that this situation poses?


A) causal time order
B) experimental mortality
C) diffusion or imitation of treatments
D) statistical regression

E) A) and B)
F) All of the above

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With respect to internal validity issues,testing refers to changes in how subjects respond to measurement while_____________refers to changes in the measurement process itself.

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The defining feature of an experiment lies in the control of the independent variable by the experimenter.

A) True
B) False

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Which of the following would be an example of selection bias?


A) volunteers
B) random assignment to experimental and control groups
C) matching on experimental and comparison groups
D) making sure that the quotas are the same for the experimental and comparison groups with respect to important variables

E) A) and B)
F) A) and C)

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The threat to the internal validity of an experiment that is called compensatory treatment refers to which of the following situations?


A) the control group subjects being paid while the experimental group subjects are not
B) the experimental group subjects being paid while the control group subjects are not
C) the subjects in the control group feel deprived of something they consider valuable
D) there is no threat to internal validity called compensatory treatment

E) A) and D)
F) A) and C)

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Which of the following is not a central feature of the classical experiment?


A) variables
B) time order
C) concepts
D) groups

E) B) and C)
F) None of the above

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C

Explain why experimentation is not well suited for the purposes of description and exploration.

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Which of the following would not be likely to impact a study's external validity?


A) do research in the natural setting
B) experiments where there is too much control of conditions
C) using an unrepresentative sample
D) applied studies reduce external validity

E) B) and C)
F) A) and D)

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You have just completed the LSAT and scored 112.Your roommate who is no smarter than you took the LSAT with you and scored 165.You were so upset with your score that you decided to take the test again and you convinced your roommate to take it with you for moral support.You both received scores on the second exam of 150.What accounted for the differences in scores?


A) statistical regression
B) testing
C) instrumentation
D) maturation

E) A) and B)
F) C) and D)

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Construct validity is concerned with the ability to generalize from the results of the experimental group to the control group.

A) True
B) False

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False

The threat of history refers to:


A) some subjects with have had history classes and others not
B) the realization that some subjects have learned from history while others have not
C) events external to the experiment that will impact the results
D) the fact that only current, relevant subjects need be studied

E) A) and D)
F) A) and C)

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One threat to internal validity in criminal justice research that is not very significant is


A) history, because few things happen on a grand scale that would impact criminal justice research
B) maturation, because criminal justice subjects are not in research studies long enough to mature
C) statistical regression, because subjects in the criminal justice system are likely to score lower than the mean anyway
D) the concern about the publication of the findings

E) B) and D)
F) All of the above

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In general,testing refers to changes in how subjects respond to measurement,whereas instrumentation is concerned with:


A) the world we live in
B) changes in the measurement process itself
C) the scientific hypothesis
D) the motive for the experiment itself

E) None of the above
F) B) and D)

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