What type of research participants should researchers use for studies of cause-and-effect relationships?

Question

Quizplus · Accepted Answer

In studies of cause-and-effect relationships, researchers should use random samples to ensure that the participants are chosen randomly from the population, reducing the risk of bias and increasing the generalizability of the results. Controlled samples may not be representative of the population, while related or skilled samples may introduce confounding variables that could affect the findings.

What Type of Research Participants Should Researchers Use for Studies