Exam 5: Experimental and Quasi-Experimental Designs

Which of the following is true regarding random assignment to groups?

The independent variable in a classical experiment must be a ratio level variable.

The threat of statistical regression is a concern any time the researcher begins with subjects who exhibit extreme values on the dependent variable.

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

If randomization is not possible, what should the researcher do?

Explain the role of randomization in classical experiments.

Identify and discuss at least five (5)threats to internal validity in experimental designs.Include in your answer ways of controlling for each of the threats you identify.

In Widom's study of the effects of child abuse and its impact upon later criminal offenses, she selected a sample of children with court records of being abuse victims and gathered a comparison group that were matched on gender, race, age and socioeconomic status.The technique used in this case was ____________________________.

In a classical experiment, the researcher uses a(n)____________________ to offset the effects of the experiment itself.

The threat of history refers to _____.

A questionnaire is sent to 1,000 police departments in Florida and gathers information on the number of sick days officers use after being involved in a shooting incident.This is an example of what type of research?

The main reason why ____________ is used to select subjects for control and experimental groups in a classical experiment is that the groups will be statistically equivalent.

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

A(n)_________________________ experiment guards against experimenters' tendency to prejudge results by eliminating the possibility of either the researcher or the subjects knowing which group is the control and which group is the experimental.

When there is a study of a large number of variables that are associated with a small number of cases or subjects, the researcher is engaged in __________________________ research.

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

Graduates majoring in criminal justice and graduates majoring in psychology from the State University were part of a study to assess employment success of those receiving their degrees in May 2002.Six months after graduation (November 2002)a questionnaire was sent out asking about their job seeking success.What type of design is this?

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