Concomitant variation describes what phenomenon in experimental design?

Concomitant variation describes what phenomenon in experimental design?

• A. The independent variable occurs before changes in the dependent variable
• B. The observed changes are linked to extraneous variables
• C. The manipulation of the independent variable is associated with changes in the dependent variable
• D. Subjects drop out during the study

Answer: (C)

Concomitant variation is about covariation between cause and effect: as you systematically vary the independent variable, the dependent variable changes in a related, predictable way. This pattern shows that the outcome tracks the manipulated factor, which is a key sign of a potential causal relationship. It isn’t about the timing of when the DV changes relative to the IV, nor about extraneous variables or participant dropout. Those are separate concerns. So the description that the manipulation of the independent variable is associated with changes in the dependent variable best captures concomitant variation.

Concomitant variation is about covariation between cause and effect: as you systematically vary the independent variable, the dependent variable changes in a related, predictable way. This pattern shows that the outcome tracks the manipulated factor, which is a key sign of a potential causal relationship. It isn’t about the timing of when the DV changes relative to the IV, nor about extraneous variables or participant dropout. Those are separate concerns. So the description that the manipulation of the independent variable is associated with changes in the dependent variable best captures concomitant variation.