EDUCATION (CBSE/UGC NET)

Detailed explanation-1: -In a scientific study, a control group is used to establish causality by isolating the effect of an independent variable. Here, researchers change the independent variable in the treatment group and keep it constant in the control group. Then they compare the results of these groups.

Detailed explanation-2: -In a clinical trial, the group that does not receive the new treatment being studied. This group is compared to the group that receives the new treatment, to see if the new treatment works.

Detailed explanation-3: -Hence, the Absence of a treatment group is a process not needed in experimental research.

Detailed explanation-4: -It relies on statistical analysis to prove or disprove a hypothesis, making it the most accurate form of research. Of the types of experimental design, only true design can establish a cause-effect relationship within a group.