Which of the following statements is least likely to be correct? A researcher might employ a pretest-posttest design when
A) the sample size is relatively small.
B) there is an extraneous variable.
C) you want assurance that the groups are equivalent at the beginning of the experiment.
D) mortality may affect the results.

Question

Quizplus · Accepted Answer

A pretest-posttest design is primarily used to measure the change in participants over time as a result of an intervention, not to control for extraneous variables. This design helps in ensuring that any changes in the posttest are attributable to the intervention rather than other factors. Options A, C, and D are situations where a pretest-posttest design might still be applicable or beneficial.

Which of the Following Statements Is Least Likely to Be