Exam 13: Experimental Research: Quasi and Single-Case Designs

Explain the characteristics of the interrupted time-series designs.

In a regression-discontinuity design the most likely validity threat is the:

When using a single-case design you should change one variable at a time.

An advantage of the A-B-A-B single-case design over the A-B-A design is that:

Explain the limitations of quasi-experimental designs in making causal inferences compared to strong designs.

Recognize and understand the methodological issues in single-case research designs.

Describe the Imitations of each of the single-case research designs discussed in Chapter 13.

What important assumption has to exist to rule out rival hypotheses in the A-B-A design?

Unlike studies with strong research designs, studies with quasi-experimental research designs:

The changing-criterion design shows the effectiveness of a treatment when:

When using single-case designs, there is agreement that each phase should be of equal length.

Time-series and single-case research designs control for confounding extraneous variables by using the same participants in all phases of the study.

The nonequivalent comparison-group design is a quasi-experimental design in which, for reasons of practicality, we cannot insure that the control and experimental groups are equivalent to each other when the experiment begins. The major interpretational difficulty imposed by this design is:

When using a multiple-baseline design, a limitation is that:

Dr. Hand conducted a study with experimental and control groups who were given pretest and posttest measures. Before analyzing his data, Dr. Hand adjusted the participant's posttest scores based on their performance on the pretest. The procedure he used to adjust the scores is known as:

A limitation of the A-B-A design is that the researcher discontinues the study in the baseline rather than intervention phase.

Visual inspection of the data in an interrupted time-series design is not always sufficient. It is sometimes important to determine if the change in response pattern is statistically significant by analyzing the data using which of the following procedures?

A statistical technique used to equate nonequivalent groups on their pretest scores in a nonequivalent comparison-groups design is:

Researchers can use quasi-experimental research designs to make inferences about causation by:

Carl is conducting a research study comparing the effectiveness of two tutoring programs. He has four schools willing to work with him on this project. However the schools are already using tutoring programs and will not allow Carl randomly assign students to the two programs. Which type of research design would be best for Carl to use?