Describe How Observer Bias Can Affect the Validity of Observational

question 77

Essay

Describe how observer bias can affect the validity of observational research. What measures can be taken to reduce bias?

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Definitions:

ECG

Electrocardiogram, a test that measures the electrical activity of the heart to show whether or not it is working normally.

Electrical Events

Activities or processes in the body that involve the flow or movement of electrical charges, such as nerve impulses and muscle contractions.

Heart

A muscular organ in most animals, which pumps blood through the circulatory system by rhythmic contraction and dilation.

Brachial Artery

A major blood vessel of the upper arm that supplies blood to the arm and hand.