Polygraphs by YI KI KATE CHAN 陈懿琪 https://padlet.com/chankate/9db1d2ic0g6048t7 en-us 2023-09-21 03:01:45 UTC 2023-09-24 06:41:21 UTC hello@padlet.com https://padlet.net/icons/png/1f47e.png What are polygraphs? chankate https://padlet.com/chankate/9db1d2ic0g6048t7/wish/2713896445 A polygraph (often known as the lie detector test) is a device or procedure hat measures and records several physiological indicators such as blood pressure, pulse, respiration, and skin conductivity while a person is asked and answers a series of questions.]]> 2023-09-21 03:11:08 UTC https://padlet.com/chankate/9db1d2ic0g6048t7/wish/2713896445 How it seems scientific chankate https://padlet.com/chankate/9db1d2ic0g6048t7/wish/2713906533 Polygraphs measure physiological arousal factors, including heart rate, blood pressure, respiration, perspiration, and skin conductivity. These factors are related with fear and nervousness. The belief is that these factors change when the subject lies.
- has a graph that shows live data. 
- has a pretest and "stimulation test" - demonstrates the accuracy of the machine

]]> 2023-09-21 03:18:47 UTC https://padlet.com/chankate/9db1d2ic0g6048t7/wish/2713906533 Why isn't it scientific chankate https://padlet.com/chankate/9db1d2ic0g6048t7/wish/2714111971 - There could be many other reasons for a person to have a high heart rate, breathe more rapidly or have a high blood pressure. 
- There is no evidence that any pattern of physiological reactions is unique to deception. An honest person may be nervous when answering truthfully and a dishonest person may be calm
- has significant error rates. Since it is used in criminal investigations, the consequences of false positives (misclassifying innocent subjects)  and failing to detect guilty individuals are huge. 
- Research on the process also shows that the examiner, examinee, the technique used to score polygraph charts and situational factors influence test validity. The subjects' education, intelligence and level of autonomic arousal can also affect the results. 
]]> 2023-09-21 05:58:56 UTC https://padlet.com/chankate/9db1d2ic0g6048t7/wish/2714111971 Reasons why its popular chankate https://padlet.com/chankate/9db1d2ic0g6048t7/wish/2714154724 The United States is the only country that allows polygraph tests to be submitted as evidence in an investigation (only banned in court for specific circumstances). Its popular in law enforcement agencies because more often than not, the threat of being caught in the lie is enough to scare suspects into telling the truth. 
- the existence of a machine that could reveal deception is convenient
- Often used in television shows, movies]]> 2023-09-21 06:30:37 UTC https://padlet.com/chankate/9db1d2ic0g6048t7/wish/2714154724 chankate https://padlet.com/chankate/9db1d2ic0g6048t7/wish/2714165796 2023-09-21 06:36:57 UTC https://padlet.com/chankate/9db1d2ic0g6048t7/wish/2714165796