Exam 8: Experimental Designs: Between-Subjects Design

In a between-subjects experiment, increasing the variance within treatments increases the likelihood of finding significant differences between treatments.

In a between-subjects experiment, one way to reduce the variance within treatments is to create more homogeneous groups by holding constant a participant characteristic such as age or gender.

A between-subjects experiment comparing four treatment conditions produces 20 scores in each treatment condition. How many individuals participated in the entire experiment?

If a between-subjects experiment produces 50 scores in treatment 1 and 50 scores in treatment 2, then the experiment must have employed ____.

Because random assignment is likely to create groups of different sizes, researchers often employ ____.

A limitation of using matching rather than random assignment to form groups in a between-subjects experiment is that matching ____.

Create an example of a between-subjects experiment. Identify the independent and dependent variables and briefly describe the experiment. Indicate the number of levels of the independent variable and identify them.