Testing is likely to threaten internal validity in a
A) posttest-only control group design.
B) static group comparison.
C) posttest only design (or one-shot case study).
D) one group pretest-posttest design.

Question

Quizplus · Accepted Answer

In a one group pretest-posttest design, testing can threaten internal validity because the pretest may influence the participants' behavior or responses in the posttest, rather than the treatment itself causing any observed changes.

Testing Is Likely to Threaten Internal Validity in a