tests in lying

Question 1

The Control Question Test

Answer 1

Questions asked in polygraph create a baseline of physiological response

Question 2

The Guilty Knowledge Test

Answer 2

Multiple choice questions relying on the subject to recognise the right answer.

Assumes if a person has inside knowledge, they will try to conceal it

Less likely to be false (in comparison to CQT)

Question 3

GKT (Guilty Knowledge Test) Limitations

Answer 3

• Investigators must know inside information about the crime
• Details about the crime on which the questions are based on must be confidential to protect innocent parties
• Some people are skilled at concealing their physiological response (therefore not reliable)