CPE Physiological Monitoring 4

Question 1

Which artifact is most likely to corrupt the EDA channel in a polygraph recording?

Accepted Answer

Loose or improperly attached finger electrodes causing contact resistance changes

Answer

Subject moving their non-instrumented hand

Answer

Inflated cardiograph cuff applied too tightly

Answer

Subject looking away from the examiner

Question 2

In polygraph scoring, a 'suppression of amplitude' in the respiratory channel most likely indicates:

Accepted Answer

Reduction in depth of breathing that may reflect inhibition or countermeasure use

Answer

Increased tidal volume suggesting relaxation

Answer

A technical malfunction in the pneumograph tube

Answer

Normal adaptation to repetitive question presentations

Question 3

The 'orienting response' (OR) measured during polygraph testing is characterized by:

Accepted Answer

A brief, initial multi-channel response to a novel stimulus that habituates with repetition

Answer

A sustained elevation in all channels throughout the entire question series

Answer

A cardiovascular response exclusively, with no respiratory component

Answer

An EDA deflection that grows larger with each repetition of the same question

Question 4

Why is the cardiograph cuff typically inflated to a pressure below systolic but above diastolic pressure during polygraph testing?

Accepted Answer

To allow arterial wall movements to be recorded while maintaining partial blood flow

Answer

To completely stop blood flow so that any return of flow indicates arousal

Answer

To measure oxygen saturation via pulse oximetry simultaneously

Answer

To prevent venous backflow from interfering with EDA measurements

Question 5

A polygraph examiner notices that a subject's EDA responses are consistently larger to comparison questions than to relevant questions. This pattern is most consistent with:

Accepted Answer

A truthful response where comparison questions generate greater concern

Answer

A deceptive response to the relevant issue

Answer

Equipment malfunction in the EDA channel

Answer

Countermeasure use directed at the comparison questions

Question 6

What does 'tidal volume' mean in the context of polygraph respiratory monitoring?

Accepted Answer

The amount of air moved in and out with each normal breath cycle

Answer

The maximum lung capacity measured during a forced inhalation

Answer

The ratio of thoracic to abdominal breathing amplitude

Answer

The respiratory rate expressed as breaths per minute

Question 7

During a polygraph exam, a subject begins pressing their toes to the floor. This action is most relevant because it can:

Accepted Answer

Generate muscle tension and pain that can create or mask EDA and cardiovascular responses

Answer

Increase respiratory rate, inflating the pneumograph readings

Answer

Reduce galvanic skin response by grounding the body electrically

Answer

Cause cardiograph cuff deflation due to lower limb vasodilation