The nonequivalent posttest-only design differs from the one-group posttest-only design and the one-group pretest-posttest design in that
A) it includes randomization procedures.
B) it has a comparison group.
C) it has high externalvalidity.
D) the results can be generalized to the population.

Question

Quizplus · Accepted Answer

The nonequivalent posttest-only design includes a comparison group, which is the primary feature that differentiates it from the one-group posttest-only design and the one-group pretest-posttest design. This comparison group allows for better control of external variables, though it does not involve randomization, and its external validity and generalizability to the population can still be limited.

The Nonequivalent Posttest-Only Design Differs from the One-Group Posttest-Only Design