Which of the following is a carefully controlled study in which the researcher manipulates a proposed cause and observes any corresponding change in the proposed effect?

Question

Quizplus · Accepted Answer

The description provided clearly matches that of an experiment, which involves manipulating a variable and observing its effect on another variable. Surveys involve obtaining data through questionnaires, interviews, or polls to gather people's opinions or attitudes, but do not involve direct manipulation of variables. Unobtrusive observation involves observing people without their knowledge, such as by analyzing records or artifacts they leave behind, and does not involve direct manipulation of variables either. Diagnostic analysis refers to the process of identifying problems or malfunctions in an organization or system, and is not a research method.

Which of the Following Is a Carefully Controlled Study in Which