Which of the following represents two groups of subjects, one of which receives a pretest measure and a posttest measure and the other received a posttest measure.
A) X1O1X2; X1O3
B) O1X1O2; X1O3
C) RO1XO2
D) X1O2
E) O1X2O2
F) X1O3

Question

Quizplus · Accepted Answer

The format O1X1O2 represents a pretest-posttest design where one group receives a pretest (O1) and then an intervention (X1), followed by a posttest (O2). The group represented by X1O3 only received a posttest measure, so it cannot be part of a pretest-posttest design. The other answer choices either do not include both pretest and posttest measures or do not have two separate groups.

Which of the Following Represents Two Groups of Subjects, One