Lie Detector
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SEMINAR TOPIC LIE DETECTOR
PRESENTED BY: RAHUL KHARE
WHAT IS LIE DETECTER
Lie detectors are the instruments that monitor a person’s reactions. Detect only the displacement in deceptive behavior.
CIRCUIT DIAGRAM
WORKING OF LIE DETECTORS
RESPIRATORY RATE. BLOOD PRESSURE. GALVANIC SKIN RESISTANCE. ARM AND LEG MOVEMENTS.
PHYSIOLOGICAL RESPONSES
POLYGRAPH EXAMINERS (PSYCHOPHYSIOLOGIST) 1.
2. 3. 4.
FUNCTIONS Setting up the polygraph and preparing the subject being tested. Asking questions. Profiling the test subject. Analyzing and evaluating test data.
REQUIREMENTS
Five years of investigative experience and associative degree. Students must attend and pass a ten week intensive course. Students must enter an internship program and conduct a minimum of 25 exams for actual cases.
ERRORS
FALSE POSITIVE- the response of a truthful person is determined to be deceptive. FALSE NEGATIVE-the response of deceptive person is determined to be truthful.
COMMON COUNTERMEASURES
The idea of counter measures is to cause a certain reactions that will skew the test’s result. Sedatives. Antiperspirant on finger tips. Tacks placed in shoes. Biting tongue ,lip or cheek.
WHO USES POLYGRAPHS?
National security(central intelligence agency,FBI,national security agency,ext). Criminal investigation. Pre employment screening. Internal affairs investigations of law enforcements. Banks.
SHORTCOMMINGS AND COUNTERMEASURES
PRESSURE ON THE SUBJECT. NO STANDARD PAPER FOR POLYGRAPH EXAMINERS. COUNTERMEASURES. POSSIBILITY OF HUMAN ERRORS IS ALWAYS THERE.
CONCLUSION Testing the conductivity of the human body. Testing the conductivity of objects. Determining whether a houseplant needs watering. Determining whether a cake is cooked.
CONCLUSION CONTINUED
ON THE BASIS OF MY STUDIED I HAD CONCLUDED THAT THIS MACHINE IS 70% CORRECT FOR LIE DETECTING AND 100% FOR OTHER PURPOSES.
THANK YOU ……. .
SEMINAR TOPIC LIE DETECTOR
PRESENTED BY: RAHUL KHARE
WHAT IS LIE DETECTER
Lie detectors are the instruments that monitor a person’s reactions. Detect only the displacement in deceptive behavior.
CIRCUIT DIAGRAM
WORKING OF LIE DETECTORS
RESPIRATORY RATE. BLOOD PRESSURE. GALVANIC SKIN RESISTANCE. ARM AND LEG MOVEMENTS.
PHYSIOLOGICAL RESPONSES
POLYGRAPH EXAMINERS (PSYCHOPHYSIOLOGIST) 1.
2. 3. 4.
FUNCTIONS Setting up the polygraph and preparing the subject being tested. Asking questions. Profiling the test subject. Analyzing and evaluating test data.
REQUIREMENTS
Five years of investigative experience and associative degree. Students must attend and pass a ten week intensive course. Students must enter an internship program and conduct a minimum of 25 exams for actual cases.
ERRORS
FALSE POSITIVE- the response of a truthful person is determined to be deceptive. FALSE NEGATIVE-the response of deceptive person is determined to be truthful.
COMMON COUNTERMEASURES
The idea of counter measures is to cause a certain reactions that will skew the test’s result. Sedatives. Antiperspirant on finger tips. Tacks placed in shoes. Biting tongue ,lip or cheek.
WHO USES POLYGRAPHS?
National security(central intelligence agency,FBI,national security agency,ext). Criminal investigation. Pre employment screening. Internal affairs investigations of law enforcements. Banks.
SHORTCOMMINGS AND COUNTERMEASURES
PRESSURE ON THE SUBJECT. NO STANDARD PAPER FOR POLYGRAPH EXAMINERS. COUNTERMEASURES. POSSIBILITY OF HUMAN ERRORS IS ALWAYS THERE.
CONCLUSION Testing the conductivity of the human body. Testing the conductivity of objects. Determining whether a houseplant needs watering. Determining whether a cake is cooked.
CONCLUSION CONTINUED
ON THE BASIS OF MY STUDIED I HAD CONCLUDED THAT THIS MACHINE IS 70% CORRECT FOR LIE DETECTING AND 100% FOR OTHER PURPOSES.
THANK YOU ……. .
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