Exam 13: Quasi-Experimental Designs

Which of the following threats to internal validity is present in a one-group pretest-posttest design?

What are pre-experimental designs, and why should they never be used?

Which of the following confounds is most likely in research that studies children over time?

The perspective that argues that researchers should rely on many diverse ways of obtaining evidence in a study is

Compared to true experiments, quasi-experiments tend to

In a simple interrupted time series design,

If quasi-experimental designs are usually not as internally valid as experiments, why do researchers use them?

In general, quasi-experiments

When participants are selected for a pretest-posttest design because they have extremely low or extremely high scores on the dependent variable, researchers must be on the lookout for

How do quasi-experimental designs differ from true experimental designs?

A researcher is studying the effects of sunspot activity on human emotions. In this study, sunspot activity is the

What are the primary threats to internal validity when a nonequivalent control group pretest-posttest design is used?

In a nonequivalent control group pretest-posttest design, the greatest threat to internal validity is

When researchers want to distinguish age differences from cohort differences, they use

Why do researchers often need to "patch up" quasi-experimental designs?

Researchers "patch-up" quasi-experimental designs by

Adding a nonequivalent control group to an interrupted time series design

Unlike an independent variable, a quasi-independent variable

Quasi-experimental designs differ from experimental designs in which of the following ways?

Contemporary history is a problem