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The four major components that make up a polygraph machine are the pneumograph, galvanograph, cardiosphygmograph, and the kymograph. These components work together to be able to determine if a subject is deceitful of not.

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Rubye Mante

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2y ago
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Angie Alim

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Wiki User

11y ago

Pneumograph - it records the changes in breathing of the subject

Galvanograph - Records the skin resistance of the subject

Cardiosphygmograph- Records the changes in blood pressure and pulse rate

Kymograph - a motor that pulls or drive the chart paper under the recording pen

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Joshua Reafor

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2y ago

What the component of pneumograph,

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Q: Four major components of polygraph machine?
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