The influence of a single independent variable is called

The influence of a single independent variable is called (a) Interaction effect

(b) Reactive effect

(c) Main effect

(d) Proactive effect

✅ Correct option: (c) Main effect

Explanation:

A main effect refers to the impact of one independent variable on the dependent variable, ignoring the influence of other independent variables. Main effects are analyzed in factorial designs alongside interaction effects. Interaction effects occur when the effect of one independent variable depends on the level of another. Reactive and proactive effects are unrelated terms. Thus, main effect is correct.

10 Related PPSC Facts:

Main effect involves one IV. Interaction involves two or more IVs. Factorial designs test main effects. Main effects are averaged across levels. ANOVA is used to test main effects. Significant main effects indicate influence. Interaction may exist without main effects. Graphs help visualize effects. Main effects simplify interpretation. Educational studies use factorial designs.