After reading this chapter, you should be able to

11.1 Contrast the between-subjects design with the between-subjects experimental design and distinguish between an experimental group and a control group.

11.2 Delineate the use of experimental manipulation and random assignment in an experiment.

11.3 Detail how group variability can be evaluated to identify differences between groups.

11.4 Identify the appropriate sampling method and test statistic to compare differences between two independent samples.

11.5 Compute a two-independent-sample t test using SPSS, and justify the assumptions required for computing this test.

11.6 Identify the appropriate sampling method and test statistic to compare differences between more than two independent samples.

11.7 Compute a one-way between-subjects ANOVA using SPSS, and justify the assumptions required for computing this test.

11.8 Articulate three types of measures for a dependent variable.