The following diagram is for which design? R X 01 (experimental group) R 01 (comparison group)
1. Pretest-posttest control group design
2. Posttest-only control group design
3. Nonequivalent control group
4. Time series
2
Rationale 1: In this case, the experimental group would have "O1" before the "X" and "O2" after the "X," indicating use of a pretest and a posttest.
Rationale 2: This is an experimental posttest-only design. Subjects are randomly assigned to groups (R), the experimental group receives the experimental treatment (X), the comparison group receives the routine treatment (no X), and a posttest is administered to both groups (O1).
Rationale 3: There is no random selection of subjects to the experimental and comparisons groups, so the notation would have no "R."
Rationale 4: In a time series design, there would be additional ‘O' subscript notations, one for each observation.
Global Rationale:
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