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.
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