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do lie detectors really work

Published on Nov 18, 2015

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PRESENTATION OUTLINE

1.

DO LIE DETECTORS REALLY WORK

  • By Dawson Bradley
Photo by CDP Photography Canada
2.

LIE DETECTION

  • Involves inperring deceptionthrough
  • Analysis of physiological responses
  • To a structured but unstandardized
  • Series of questions
3.

POLYGRAPH

  • Test is administered
  • To determine whether or not statements
  • Made by the subject taking the test are
  • Deceptive
Photo by Vibragiel
4.

THE COMPONENTS

  • The three componets of the polygraph
  • Instrument include the cardiosphygmgraph
  • The pjeumog graph and the galvanograoh
5.

WHAT DETERMINES IT TO WORK

  • Blood pressure and heart rate
  • Are measured by the cardio sphygmograph
Photo by Giant Ginkgo
6.

Untitled Slide

  • During the test the examiner and the subject
  • Have to be alon
Photo by CDP Photography Canada
7.

ABOUT 80 PERCENT IS ACCURATE

8.

SERIES OF QUESTIONS

CONSISTS ABOUT 10 TO12 QUESTIONS THT REQUIRE YES OR NO
Photo by jamieallen
9.

THE FIRST POLYGRAPH WAS INVENTED IN1921

Photo by Wysz
10.

WHAT CAN CAUSE YOU TO FAIL A TEST

  • A Nervous or intimidated person telling the truth could easily give off physical stress signals
Photo by Vox Efx

Dawson Bradley