Which of the following involves the manipulation of independent variables to measure their effect on,or the change in,dependent variables,while everything else is held constant or controlled?
A) The survey
B) The case
C) The experiment
D) The questionnaire

Question

Quizplus · Accepted Answer

An experiment involves the manipulation of independent variables to observe their effect on dependent variables while keeping everything else constant. Surveys and questionnaires gather data through self-report and observations, but do not involve manipulation of variables. A case study involves deep analysis of a single case or subject, but does not necessarily involve manipulation or control of variables.

Which of the Following Involves the Manipulation of Independent Variables