Exam 7: Experiments

The variable used to specify a cutoff score for eligibility for some treatment in a regression-discontinuity design is called ______.

A time series before-and-after quasi-experimental design makes multiple observations in both pretest and posttest periods.

A study of a policy change that affects all members of your organization is best done using what technique?

If a control group realizes they are being denied some advantage,which two processes may create invalid experimental findings:

In nonequivalent control group designs,the comparison group is selected by using ______.

Which of the following is FALSE about pretesting in experiments?

In experimental research,the researcher controls the causal mechanism.

What is the primary difference between true experiments and quasi-experimental designs? Why is this difference so important?

Describe the characteristics of a true experiment.Explain how true experiments meet (or don't meet)the criteria for causality.Do quasi-experiments and nonexperimental designs improve on these criteria? Explain how (or how not).

Schutt indicates that the "Achilles heel" of true experimental design is ______.

Which of the following CANNOT explain any change over time in most of the before-and-after designs?

True experiments can have only two comparison groups: an experimental and a control group.

Which of the following is NOT a requirement of a true experiment?

True experiments are designed to maximize ______.

A common feature of all before-and-after designs is ______.

What is the effect of history? Provide an example of a study and how it could be affected by an external event.

What are the main ethical concerns in experimental design?

Field experiments have particular difficulty controlling for ______.

The most powerful type of quasi-experimental design that can be considered a before-and-after design is the ______.

A control group receives no treatment in an experiment.