polygraph

Question 1

what happens when we lie? (2)

Answer 1

• Psychological change
• Influences physiological changes
  (These can be recorded & interpreted)

Question 2

Autonomic Nervous System:

1. parasympathetic (6)
2. sympathetic (8)

Answer 2

1. stimulates saliva
2. slows HR
3. contracts bronchi
4. stimulates peristalsis
5. stimulates release of bile
6. contracts bladder
   - —–
7. dilates pupil
8. inhibits salive flow
9. accelerates HR
10. dilates bronchi
11. inhibits peristalsis
12. conversion of glycogen to glucose
13. secretion of adrenaline
14. inhibits bladder contraction

Question 3

Polygraph examination

• is?
• types (3)
• polygraph uses (3)

Answer 3

AKA PDD

• psychophysiological detection of deception examination
  1. comparative questions test (CQT)
  2. peak of tension test
  3. guilty knowledge test
• 1. investigative test
  2. screen candidates
  3. screen offenders

Question 4

CQT (4)

Answer 4

 Pretest Interview
 Irrelevant Questions
 Comparison Questions  Relevant  Questions

Question 5

Peak of tension test

Answer 5

Investigator uses probing questions, looking into

questions eliciting largest response

Question 6

Guilty knowledge test

Answer 6

 Utilizes questions about specific crime known only to investigators & criminal

Question 7

Evaluation of Polygraph technique

• overall? (2)
• 2 countermeasures
• validity (2/%)

Answer 7

Outcome strongly influenced by examiner
High profile cases where deception was not detected & crime was committed
1. physical
2. psychological
- little support among scientists, advocates claim 95-100% accuracy

Question 8

Sex offender polygraph monitoring (3)

Answer 8

• Sex offenders routinely polygraphed in many states
• Statements of further sex crimes while on probation may be used to revoke probation
• Polygraph monitoring used in some sex offender rehabilitation programs