Experimental Design

A method of assigning subjects to groups in which pairs of subjects are first matched on some characteristic and then individually assigned randomly to groups.

• Pretest-postest design

• Matched pairs design

• Within-subjects (repeated measures) design

• Between-subjects design

• Posttest-only design

An experiment in which different subjects assigned to each group. Also called independent groups design.

• Pretest-posttest design

• Posttest-only design

• Matched pairs design

• Between-subjects design..

• Within subjects (repeated measures) design

A true experimental design in which the dependent variable (posttest) is measured only once, after manipulation of the independent variable.

• Matched pairs design

• Within-subjects (repeated measures) design

• Posttest-only design

• Pretest-posttest design

• Between subjects design

An experiment in which the same subjects are assigned to each group.

• Within-subjects (repeated measures) design

• Pretest-posttest design

• Posttest-only design

• Matched pairs design

• Between-subjects design

A true experimental design in which the dependent variable is measured both before (pretest) and after (posttest) manipulation of the independent variable.

• Posttest-only design

• Matched pairs design

• Within-subjects (repeated measures) design

• Between-subjects design

• Pretest-posttest design