In addition to random assignment, what other component is necessary for a study to be considered an experiment?

Question

Quizplus · Accepted Answer

Manipulation of an independent variable is necessary for a study to be considered an experiment, as it allows for the establishment of cause-and-effect relationships. Random assignment and selection are important components of experimental research design, but they alone do not make a study an experiment. The presence of dependent variables is also necessary for many types of research, but it is not unique to experimental design.

In Addition to Random Assignment, What Other Component Is Necessary