The Solomon four-group design allows a researcher to measure ______.
A) all confounding variables that may be present
B) the effect of taking the pretest on the scores on the posttest
C) group differences between the control and experimental groups
D) the causal effect of the treatment

Question

Quizplus · Accepted Answer

The Solomon four-group design allows a researcher to measure the effect of taking the pretest on the scores on the posttest. This design involves four groups of participants: two groups that receive a pretest before the experimental treatment, and two groups that do not receive a pretest. This design helps to control for the potential confounding variable of pretest sensitization, which refers to the idea that taking a pretest may sensitize participants to the experimental treatment and affect their scores on the posttest. By comparing the posttest scores of the two groups that received the pretest to the posttest scores of the two groups that did not receive a pretest, researchers can determine if pretest sensitization had an effect on the results.

The Solomon Four-Group Design Allows a Researcher to Measure ______