UGC NET Questions (Paper – 1)

Statements A, B, C and E are all correct descriptions of different roles that variables can play in research. The independent variable is manipulated, the dependent variable is the measured outcome, mediators explain the mechanism linking the two and extraneous variables can disturb this relationship if not managed. Statement D is false because control variables are not varied; they are held constant to minimise their influence. Thus the correct combination must include A, B, C and E while excluding D.

Option A:
Option A includes A, B and C but omits E, thereby ignoring the important influence of extraneous variables on internal validity. Without recognising the potential confounding effect of extraneous variables, the description of variable types remains incomplete.

Option B:
Option B is correct because it brings together all four accurate statements about independent, dependent, mediating and extraneous variables. It excludes D, which incorrectly suggests that control variables are deliberately varied rather than controlled.

Option C:
Option C wrongly includes D, the false statement about control variables, and omits B, which correctly defines the dependent variable. This combination therefore both adds an incorrect assertion and drops a key correct one.

Option D:
Option D contains D alongside B and E. Since D misrepresents control variables, this option becomes invalid even though it includes two true statements.

Option E offers only C and E, leaving out the basic definitions of independent and dependent variables provided in A and B. Because it fails to include all the true statements, it cannot be the correct answer.

Statement C is wrong because extraneous variables are not simply irrelevant; they may influence the dependent variable and therefore often need to be controlled or accounted for in the design or analysis. Statements A, B, D and E are correct: the independent variable is manipulated or selected, the dependent variable is the measured outcome, control variables are held constant, and moderator variables can change the strength or direction of relationships. Hence, C alone is the incorrect statement and must be isolated as such.

Option A:
Option A is incorrect because it groups A, B and D as wrong, even though these three statements correctly define independent, dependent and control variables. Treating them as wrong would overturn standard terminology used in research methodology.

Option B:
Option B is correct because it identifies C alone as the wrong statement and implicitly accepts that A, B, D and E accurately describe the different roles variables can play. It highlights that extraneous variables require attention rather than dismissal.

Option C:
Option C is wrong because it combines C with D and thereby mislabels D as incorrect. Statement D rightly explains that a control variable is intentionally held constant to remove its influence on the dependent variable.

Option D:
Option D is also incorrect since it pairs C with E, wrongly suggesting that moderator variables cannot influence the relationship between independent and dependent variables. Statement E is actually a correct description of moderator variables.

Control variables are factors that the researcher deliberately holds constant or accounts for so that they do not confound the relationship between the independent and dependent variables. By stabilising these variables, the researcher reduces alternative explanations for observed effects. This enhances the internal validity of the experiment. Because the stem refers to variables kept constant to prevent them from influencing outcomes, it is describing control variables.

Option A:
Independent variables are intentionally manipulated to assess their impact on outcomes, not held steady. Their variation is central to testing hypotheses about cause and effect. Thus, independent variables are the opposite of what the stem indicates and cannot be the correct answer.

Option B:
Dependent variables are the outcomes measured to see whether they change as a result of the independent variable. They are expected to vary and are not kept constant. Since the question is about variables that are purposely held constant, dependent is not appropriate.

Option C:
A moderator variable influences the strength or direction of the relationship between independent and dependent variables, helping to specify “when” or “for whom” an effect is observed. Although researchers may sometimes create conditions based on moderators, the classic notion of control variables is more directly about holding factors constant. Therefore, moderator does not fit the stem’s description.

Option D:
Control variables are chosen and managed to remove their potential influence, such as keeping room temperature constant in a cognitive experiment. This deliberate stabilisation ensures that observed differences in the dependent variable are more likely due to the independent variable. These functions match the description in the stem, so control is the correct completion.