What Technique Could Best Control for Antecedent Variables in a Study

question 30

Multiple Choice

What technique could best control for antecedent variables in a study using true or classic experimental design?

• A) Manipulation of the independent variable
• B) Manipulation of the dependent variable
• C) After-only data collection
• D) Random assignment

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Definitions:

AV Valve

The atrioventricular (AV) valve regulates blood flow from the atria to the ventricles in the heart.

Bundle of His

A collection of heart muscle cells specialized for electrical conduction that transmits the electrical impulses from the AV node to the point of the apex of the fascicular branches.

Pulmonary Veins

Blood vessels that carry oxygenated blood from the lungs to the left atrium of the heart.

Left Atrium

The heart's upper left chamber that receives oxygen-rich blood from the lungs and pumps it into the left ventricle.