Understanding Lie Detectors

The video explores the concept of lie detectors, explaining how they measure physiological responses to stress, such as increased pulse, breathing, and sweating. The narrator attempts to deceive a polygraph test by using techniques like pressing a drawing pin in their shoe and applying antiperspirant to reduce sweat. Despite these efforts, the narrator fails the test due to distinct stress patterns. The video concludes by noting that polygraph results are not admissible as sole evidence in UK courts but may influence a jury.

What physiological changes do lie detectors primarily measure?

• Blood sugar, temperature, and vision

• Heart rate, breathing, and sweating

• Muscle strength, flexibility, and endurance

• Hearing, taste, and smell

What is the primary goal of establishing a baseline in a polygraph test?

• To determine the subject's normal stress levels

• To confuse the subject

• To make the subject nervous

• To test the equipment

What was the purpose of using a drawing pin during the polygraph test?

• To distract the examiner

• To increase stress levels during baseline questions

• To decrease heart rate

• To improve concentration

What was the narrator's initial act of dishonesty?

• Cheating on a test

• Taking a games console

• Stealing a car

• Lying about their age

How did the narrator attempt to reduce skin conductivity during the test?

• By taking deep breaths

• By wearing gloves

• By using antiperspirant

• By drinking water

Which famous spy was mentioned as having beaten polygraph tests?

• Aldridge Ames

• Mata Hari

• Kim Philby

• James Bond

What did the narrator hope to achieve by using antiperspirant?

• To smell better

• To reduce skin conductivity

• To increase heart rate

• To lower blood pressure

What was the outcome of the polygraph test for the narrator?

• The test was inconclusive

• The narrator failed the test

• The narrator passed the test

• The test was not completed

Why did the drawing pin technique fail to deceive the polygraph?

• It caused a different type of stress spike

• It was used at the wrong time

• The examiner noticed the pin

• It was not painful enough

What is the legal status of polygraph test results in UK courts?

• They are mandatory for all cases

• They can help persuade a jury

• They are not admissible

• They are conclusive evidence