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Five of the six people arrested by the Delhi Police in connection with the Parliament security breach on December 13 last year gave their consent before a court here on Friday to undergo a polygraph test.
The court also extended the police custody of the accused — Manoranjan D., Sagar Sharma, Amol Dhanraj Shinde, Neelam Azad, Lalit Jha, and Mahesh Kumawat — by eight days.
A polygraph test, often called a lie detector test,
It is a procedure that measures and records physiological responses such as:
Blood pressure
Pulse rate
Respiration
Skin conductivity (sweating)
It's based on the assumption that these responses will change when a person is being deceptive.
Pre-test interview: The examiner discusses the test and types of questions to be asked.
Sensor attachment: Sensors are attached to the examinee's body to measure the physiological responses.
Questioning: The examiner asks a series of questions, including both relevant (related to the issue being investigated) and control questions (not related to the issue).
Data analysis: The examiner analyzes the physiological responses to determine whether they indicate deception.
Polygraph tests are not 100% accurate.
Their accuracy is estimated to be around 80-90%, but this can vary depending on the examiner's skill, the examinee's cooperation, and other factors.
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