Polygraph Notes Flashcards

1
Q

The polygraph instrument examination is applied in two different areas:

A

Criminal Matters -Specific Incident (Crime)

Employment Background Screening (pre-employment).

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2
Q

The autonomic (self-regulating) nervous system has 2 part.

A

The parasympethetic system: (high stress situation) in this situation: heart-rate increases, respiration and perspiration increase.

The sympathetic nervous system: is active after the stress is over allowing the body to wind down & rest, ie. doing its “housekeeping” functions such as digestion, slowing heart rate & blood pressure.

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3
Q

The Polygraph measures: 3 things

A
  • heart rate, blood pressure- measured by a sphygmomanometer (B.P. Cuff)
  • respiratory rate-pneumograph tubes fastened around abdomen & chest
  • electro-dermal activity (sweatiness)- measures galvanic skin response by electrodes placed on fingertips
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4
Q

Common Countermeasures:

A

o Sedatives, Antiperspirant on fingertips, Tacks placed in the shoe, & Biting tongue, lip or cheek.

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5
Q

Admissibility

A

Given the controversy over the accuracy and assumptions of polygraph tests, the results from them are typically deemed inadmissible in most courts.

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