Which of the following is an example of a one-group posttest-only quasi-experimental research design?

A. A researcher records exam scores following a new lecture.
B. A researcher records verbal scores in a group of children prior to giving a treatment aimed at improving verbal abilities.
C. A researcher measures job rates in two cities with comparable demographics.
D. A researcher measures weight gain before and after a group of participants begin a new diet plan.


Ans: A

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