matched-groups design.
Jack is doing a project in educational psychology. Before
the experiment, he rank-orderes all his participants according to achievement
test scores. He takes the top two scores and randomly assigns one to the
experimental group and one to the control group
Then he takes the next two scores and randomly assigns one
to the experimental group and one to the control group. He continues in this
manner until all participants have been assigned. What procedure is Jack using?





