polygraph Flashcards
1
Q
what happens when we lie? (2)
A
- Psychological change
- Influences physiological changes
(These can be recorded & interpreted)
2
Q
Autonomic Nervous System:
- parasympathetic (6)
- sympathetic (8)
A
- stimulates saliva
- slows HR
- contracts bronchi
- stimulates peristalsis
- stimulates release of bile
- contracts bladder
- —– - dilates pupil
- inhibits salive flow
- accelerates HR
- dilates bronchi
- inhibits peristalsis
- conversion of glycogen to glucose
- secretion of adrenaline
- inhibits bladder contraction
3
Q
Polygraph examination
- is?
- types (3)
- polygraph uses (3)
A
AKA PDD
- psychophysiological detection of deception examination
1. comparative questions test (CQT)
2. peak of tension test
3. guilty knowledge test - investigative test
- screen candidates
- screen offenders
4
Q
CQT (4)
A
Pretest Interview
Irrelevant Questions
Comparison Questions Relevant Questions
5
Q
Peak of tension test
A
Investigator uses probing questions, looking into
questions eliciting largest response
6
Q
Guilty knowledge test
A
Utilizes questions about specific crime known only to investigators & criminal
7
Q
Evaluation of Polygraph technique
- overall? (2)
- 2 countermeasures
- validity (2/%)
A
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
8
Q
Sex offender polygraph monitoring (3)
A
- 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
