How LIE DETECTOR catches your Lie?
Find the Truth with LIE DETECTOR
Now, in 1921 a medical student from the University of California named as John Larson invented a very first polygraph graph machine.

In 1925, Leonarde Keeler modified the instrument which was made by John Larson. This instrument was really working better than before in catching lies.
The word "Polygraph" is made from 2 Greek words that are:
- Poly means "Many"
- Graph means "Writing"

- Breathing Rate
- Sweat Level and
- Heart Rate
According to a survey in US, every year around 70,000 people take polygraph test to secure jobs in government sector. This technology is mostly used in:
- Court Room
- Police Departments
- Federal Agencies
- Basic Questions
- Target Questions
- Other Base Line Questions
- Small Graphs: It shows that the person is in normal conditions and providing correct answers.
- Large Graphs: It shows that the person is in stress and may be lying.
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