Correct option is D
Correct Option: d)
Experimental research is a scientific method of investigation where a researcher manipulates and controls one or more independent variables to observe their effect on a dependent variable, while randomly assigning subjects to different groups (e.g., control and experimental groups) to establish cause-and-effect relationships.
Information Booster:
· Studying the
impact of music on differently-abled persons is a classic example of
Experimental research.
· In such a study, music (the
independent variable) is systematically applied as an intervention or stimulus.
· Researchers then measure its effects (the
dependent variable), such as changes in behavioral, cognitive, or physiological responses in the participant group.
· This involves careful design, controlled conditions, and often pre-and post-testing to objectively determine causality—whether music caused a specific change.
Additional Knowledge:
·
Pure research (or basic research) is driven by curiosity and the aim to expand fundamental knowledge without immediate practical application.
·
Theoretical research involves developing abstract concepts, models, or theories without direct empirical data collection.
·
Historical research investigates past events, trends, or figures through the analysis of primary and secondary sources.
· The described study is not focused on history, pure theory, or knowledge for its own sake, but on testing an
applied hypothesis in a controlled manner.