Paper 1 · Research Aptitude
In an experimental test with two randomly assigned groups, an experimental group and a control group, neither group is pretested before the treatment, and the treatment is then applied to the experimental group. Which kind of test is this?
APretest-only design
BPost-test-only design ✓ Correct
CPretest-post-test design
DOne-group pretest-post-test design
Correct answer: (B) Post-test-only design — Two randomized groups with no pretest, treating only the experimental group, is a post-test-only design, so that is the answer.
Explanation
★Two randomized groups with no pretest, treating only the experimental group, is a post-test-only design, so that is the answer.
★In a post-test-only design the groups are measured only after the treatment, not before.
★Here neither group is pretested, and the outcome is compared only after the treatment is applied.
★A pretest-only design would measure before but is not the standard true-experiment form here.
★A pretest-post-test design would test the groups both before and after the treatment.
★A one-group design has no control group, so two randomized groups tested only afterward is a post-test-only design.
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