Mechanics Of Instrumentation And Operation Flashcards
Galvanograph- (GSR) Galvanic Skin Response
now EDA Electro Dermal activity
What are six pretest requirements?
Obtain consent Identify the subject Physical/Mental evaluation Discuss case information Review test questions Explain the polygraph
Pneumograph
Respiration
- Ground Truth
What actually happened
- Subjects involved
Examiner and Examinee
- Physiological Criteria
Respiration
EDA
Cardiovascular
What are the 4 phases of examination?
- Pretest- most important sets the tone.
- Intest-
- Post test-
- Test data analysis-
Five steps to explain process
- Interviewer poses questions- explain to subject they will be asked questions.
- Subject psychologically interprets- tell subject to interpret questions and if they have any problems
- Physiological changes occur- breathing, cardio and EDA. Your brain works harder to lie
- Polygraph records changes
- Collected data is interpreted
When diachrotic notch is high pressure is ____.
Low
As blood pressure gets _____ diachrotic notch is low.
High
+ comparison
-revelance
More +’s passed
More - failed
Marston measured ________ and _________.
discontinuous and intermittent
//
Stim Mark beginning & end of question
+
Yes answer
-
No
M
Movement
SN
Sniff
SZ
Sneeze
T
Talk
C
Cough
CT
Cleared throat
Si
Audible sigh
B
Belch
L
Laugh
Pneumograph should have ______ of deflection
1 inch
EDA should have ____ to _____ deflection when stimulated
11/2 to 2 inch deflection when stimulated
Cardio should obtain ______
3/4 inch
Polygraph charts should contain Identification data, recorded data collected from your subject and _________.
Chart markings
Polygraph charts should contain Pneumograph tracing, EDA tracing, cardiograph tracing and _______ tracing.
Movement
EE
Examiner error
Ti
Talking instructions
Mi
Moving instructions
N
Noise
OSN
Outside noise
N—-N
Prolonged noise
T—T
Prolonged talking
^v
Tracing sensitivity
inflate the cardio to approximately ________ of pressure
60 mm to 70 mm, subjects with good blood pressure may be slightly lower, subjects with higher pressure slightly more.
When beginning, obtain ___________ of normal tracing average
30 seconds to one minute
Strive to maintain consistent 25 second ________.
Question pacing
Refers to the particular visual representation of the physiological data that is studied for its diagnostic value
Tracing
4 types of tracing
Homeostasis- baseline
Tracing response- arousal to stimulus
Tracing recovery-recovery from a tracing response
Artifact- distortion
To be considered a response to the question still ulus physiological arousal must occur within an anticipated amount of time from Sri ulus onset
Response
Tracing segments which show resulting evidence of a physiological, return to baseline e or homeostasis occurring as a compensatory action after a response artifact or any other form of excessive noise
recovery
A change in physiological pattern not attributed to an applied stimulus or from psychological, fear of detection of deception
Artifact
When to check if EDA is adjusted
When you put cuff, when you state is beginning
And the first question
Conductance increases while ______ decreases
Resistance
Counter measures (Nelson)
Faking physiology