CPE CPE Instrument Technology

Question 1

What component of a polygraph instrument measures changes in respiratory patterns?

Accepted Answer

Pneumograph

Answer

The pneumograph consists of corrugated rubber tubes placed around the thorax and abdomen to record respiratory changes during a polygraph examination.

Question 2

Which polygraph component records electrodermal activity (skin conductance)?

Accepted Answer

Galvanic skin response sensor

Answer

The galvanic skin response (GSR) sensor, also called the electrodermal activity sensor, measures changes in skin conductance caused by sweat gland activity.

Question 3

What does the cardiorespiratory channel on a computerized polygraph system primarily measure?

Accepted Answer

Relative blood pressure and pulse rate changes

Answer

The cardiorespiratory channel measures relative changes in blood pressure and pulse rate using an inflated cuff typically placed on the upper arm.

Question 4

In computerized polygraph systems, what is the typical minimum sampling rate recommended for accurate physiological data capture?

Accepted Answer

50 Hz

Answer

A minimum sampling rate of 50 Hz (50 samples per second) is generally recommended by the American Polygraph Association for computerized polygraph systems to ensure accurate data capture.

Question 5

Which sensor placement on a computerized polygraph records finger pulse volume?

Accepted Answer

Plethysmograph

Answer

The plethysmograph, typically a photoplethysmograph clipped to a finger, measures volumetric changes in blood flow to detect pulse and vascular activity.

(CPE) Certified Polygraph Examiner Practice Test

(CPE) Certified Polygraph Examiner Practice Test

CPE CPE Instrument Technology