The Solomon four-group design is an experimental research design in which different participants are assigned to each of four groups in such a way that comparisons can be made to ______.
A. determine if a treatment causes changes in posttest measure.
B. control for possible confounds or extraneous factors related to giving a pretest measure and observing participants over time.
C. strengthen power by reducing the number of participants needed to be able to observe an effect
D. determine if a treatment causes changes in posttest measure and control for possible confounds or extraneous factors related to giving a pretest measure and observing participants over time
Answer: D
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