Posttest Only, Control Group design
a great deal like the Two Group, Ex Post Facto design, with the inclusion of
R - Random assignment
Posttest Only, Control Group
design does not use a pretest measure to establish a benchmark.
This is a two group design including an
experimental group and a control group, where assignment to groups
occurs through randomization. The experimental group is
exposed to the manipulation; the control group is not.
There is no premeasurement - a
measure of how conditions would have been if there was no manipulation.
Both measures are taken after the manipulation occurred. There is
This design recognizes the
threats associated with pretesting effect and pretest-manipulation