Example of an Interrupted Time-Series Design with Nonequivalent Groups: Factory Shift Reduction

Example of an Interrupted Time-Series Design with Nonequivalent Groups: Student Absences

What is the defining feature that an interrupted time-series design with nonequivalent groups adds to a basic interrupted time-series design?

A researcher is evaluating a new mindfulness program in a psychiatric clinic using an interrupted time-series design with nonequivalent groups. Arrange the steps of this study in the correct methodological order.

A researcher investigates the effectiveness of a new 'Stress-Reduction Workshop' at Hospital A by measuring staff burnout levels every month for one year before and one year after the workshop is introduced. To strengthen the evidence, they also track monthly burnout levels at Hospital B, a similar facility where no workshop is offered. Match each element of this study to its appropriate methodological role.

In an interrupted time-series design with nonequivalent groups, if both the treatment group and the nonequivalent control group show an identical, sudden shift in the dependent variable at the point in time the intervention was introduced to the treatment group, the researcher can still safely conclude that the intervention was the primary cause of the change in the treatment group.

Which of the following best describes how groups are formed in an interrupted time-series design with nonequivalent groups?

Which of the following best explains how a researcher uses a nonequivalent control group to strengthen the conclusions of an interrupted time-series design?

When evaluating the internal validity of a quasi-experimental study, the interrupted time-series design with nonequivalent groups is judged as superior to a single-group design because the control group provides a necessary _____ for determining whether the treatment group's change is truly due to the intervention rather than a coincidental historical event.

A school psychologist measures the monthly disciplinary incidents at two different middle schools (School A and School B) for six months before and six months after School A implements a new restorative justice program. Because students were not randomly assigned to the schools, this scenario represents an application of an interrupted time-series design with nonequivalent groups.

Match each methodological component of an interrupted time-series design with nonequivalent groups with the analytical purpose it serves in evaluating an intervention.

To evaluate whether a quasi-experimental study's results are due to the intervention itself rather than external historical factors, a researcher should compare the baseline and post-intervention trends of the treatment group to those of a nonequivalent _____.