A randomized experiment
A) cannot be a good evaluation design.
B) relieves the evaluator of worrying about most of the threats to internal validity.
C) has high external validity.
D) lowers Type I error compared to a quasi-experimental design.

Question

Quizplus · Accepted Answer

Randomized experiments are considered the gold standard in evaluation design as they control for most threats to internal validity, including history, selection bias, and maturation. Randomization allows for groups to be similar at the start of the study, making it easier to attribute any observed differences to the treatment. However, it is important to note that randomized experiments may not always have high external validity and may not be the most feasible or ethical design for certain research questions. Additionally, randomized experiments do not guarantee lower Type I error compared to all quasi-experimental designs.

A Randomized Experiment