The one-group pretest-posttest design may be symbolized as O₁X₂ O_2. In this design,a group of test units is measured ________. A)once B)twice C)not at all D)none of the above

Question

Quizplus · Accepted Answer

In the one-group pretest-posttest design, the group of test units is measured once before the treatment (pretest) and then again after the treatment (posttest). Therefore, they are measured twice.

The One-Group Pretest-Posttest Design May Be Symbolized as O1 X2

The One-Group Pretest-Posttest Design May Be Symbolized as O₁X₂