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Nonequivalent Groups
When participants in a between-subjects experiment are placed into conditions without the use of random assignment, the resulting groups will likely be dissimilar in various ways. Because these groups possess inherent, pre-existing differences from the outset, researchers consider them to be nonequivalent.
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Research Methods in Psychology - 4th American Edition @ KPU
Related
Random Assignment
Advantages of Between-Subjects Experiments
Independent-Samples t-Test
One-Way ANOVA
Within-Subjects Experiment
Matched-Groups Design
Examples of Between-Subjects Experiments
Example of Lack of Context in Between-Subjects Designs
Combining Between-Subjects and Within-Subjects Designs
Equivalent Groups
Nonequivalent Groups
Which of the following best describes a between-subjects experiment?