CPE CPE Instrument Technology 2

Question 1

What is the recommended cuff inflation pressure range for the cardio component during a polygraph examination?

Accepted Answer

60–90 mmHg

Answer

The cardio cuff is typically inflated to 60–90 mmHg, a level below diastolic blood pressure, to record relative cardiovascular changes without fully occluding arterial flow.

Question 2

Which of the following best describes the role of the baseline calibration check before a polygraph test?

Accepted Answer

It verifies instrument channels are functioning and recording properly

Answer

A pre-test calibration check ensures all instrument channels are operational and recording clean physiological signals before the formal examination begins.

Question 3

In a computerized polygraph system, what does 'gain' refer to?

Accepted Answer

The sensitivity or amplification of a physiological channel

Answer

Gain is the amplification factor applied to a physiological channel; adjusting gain allows the examiner to optimize the tracing size for accurate visual and algorithmic analysis.

Question 4

What is a 'stim test' (stimulation test) used for in polygraph examinations?

Accepted Answer

To demonstrate to the subject that the instrument can detect deception

Answer

A stimulation test (known number or card test) is used to convince the subject that the polygraph can detect lies, which helps ensure robust physiological responses during the actual examination.

Question 5

Which APA-approved computerized polygraph system uses proprietary algorithms such as OSS-3 for scoring?

Accepted Answer

Lafayette LX5000

Answer

The Lafayette LX5000 includes OSS-3 (Objective Scoring System version 3), a validated algorithmic scoring tool used to provide a probabilistic assessment of truthfulness.

(CPE) Certified Polygraph Examiner Practice Test

(CPE) Certified Polygraph Examiner Practice Test

CPE CPE Instrument Technology 2