Controlled group condition is applied in

Question

Accepted Answer

Experimental research is a systematic and scientific approach to research where the researcher manipulates one or more independent variables and controls any change in other dependent variables. The primary objective is to establish cause-and-effect relationships. To achieve internal validity, researchers utilize a control group alongside an experimental group. The control group serves as a baseline comparison, remaining isolated from the independent variable manipulation, which allows researchers to prove that any observed change is solely due to the tested treatment.

Correct Option (Option 3):
Experimental research relies on strict manipulation and control to isolate variables. The control group condition is an indispensable design feature used to establish a baseline. By keeping extraneous variables constant for both groups, researchers can confidently attribute any variations in the dependent variable to the treatment given to the experimental group.

Incorrect Option (Option 1):
Survey research is a quantitative and qualitative method used to gather information from a sample population about their attitudes, behaviors, or opinions. It typically involves questionnaires or interviews to describe a current phenomenon across a large group. Because the researcher relies on self-reported data without active environmental manipulation, it does not apply a controlled group condition. The setting remains natural rather than laboratory-controlled.

Incorrect Option (Option 2):
Historical research focuses on studying, understanding, and interpreting past events to reach conclusions about current or future trends. It depends entirely on primary and secondary source materials like documents, artifacts, or diaries. Researchers cannot manipulate past variables or establish physical control groups since the events have already occurred. Therefore, experimental control conditions are completely inapplicable to this methodology.

Incorrect Option (Option 4):
Descriptive research aims to systematically describe a situation, problem, phenomenon, or program as it naturally exists. It answers questions such as what, where, and when, rather than why or how a relationship exists. Researchers collect data through observations or case studies without altering any environment or introducing interventions. Consequently, it lacks the independent variable manipulation and baseline comparison groups characteristic of controlled conditions.