Effects of history (and other sources of bias that occur over time) are least likely to occur in pretest-posttest designs.

Question

Quizplus · Accepted Answer

Pretest-posttest designs are susceptible to history effects, as any outside factors that may have occurred during the study period can affect both the pretest and posttest measures. However, using a control group or randomization can help to minimize these biases.

Effects of History (And Other Sources of Bias That Occur