What is the difference between a randomized controlled trial and a quasi-experiment?

Question

Quizplus · Accepted Answer

The main difference between a randomized controlled trial and a quasi-experiment is that, in a randomized controlled trial, participants are randomly assigned to different groups, while in a quasi-experiment, participants are not randomly assigned to different groups. Instead, the groups are typically pre-existing, and the researcher simply observes and compares the groups based on the independent variable. Therefore, choice C is the correct answer, as it accurately reflects this difference between the two types of studies. Choices A, B, and D are incorrect, as they do not accurately reflect the difference between randomized controlled trials and quasi-experiments.

What Is the Difference Between a Randomized Controlled Trial and a Quasi-Experiment