Posttest Only Nonequivalent Groups Design

Pretest-Posttest Nonequivalent Groups Design

Interrupted Time-Series Design with Nonequivalent Groups

What is the defining characteristic of a nonequivalent groups design?

Because a nonequivalent groups design does not use random assignment, researchers must expect that their comparison groups will likely have pre-existing differences that could threaten the internal validity of their research.

A psychology researcher is investigating the effectiveness of a new 'Study Skills' seminar. Match each research scenario with the specific reason it constitutes a nonequivalent groups design.

Analyze the logical progression of how a nonequivalent groups design introduces threats to internal validity. Arrange the following steps in the correct order to show the relationship between the design choice and the resulting experimental confounding.

As a school psychologist, you are tasked with designing a study to evaluate whether a new 'Peer Mediation' program reduces playground conflict. If you are required to use a nonequivalent groups design, which of the following research plans should you develop?

A nonequivalent groups design is a type of between-subjects design where researchers do not use _____ assignment to allocate participants to conditions.

When evaluating whether a researcher can justify causal conclusions in a nonequivalent groups design, a critic would point out that the lack of random assignment fails to control for _____ variables, which serve as alternative explanations for the results.

A researcher compares a school that voluntarily implements a new mindfulness program with another school that does not. At the end of the year, students at the mindfulness school score significantly higher on a test of emotional regulation. True or False: Because this is a nonequivalent groups design, the researcher can confidently conclude that the mindfulness program caused the improvement in emotional regulation.

A researcher investigates a new teaching method by comparing two existing classrooms. Match each component of this nonequivalent groups design study with its corresponding analytical description.

Arrange the steps in the correct logical order to evaluate the validity of a researcher's causal claim in a study using a nonequivalent groups design.