During an Interrogation Polygraphs Measure Quizlet?

Polygraph measures physiological changes associated with arousal. What does the polygraph record? Heart rate, blood pressure, breathing rate and galvanic skin response. ... These physiological responses for these two types of control questions can then be compared to get an accurate baseline measure of arousal.

What does a polygraph test measure?

The instrument typically used to conduct polygraph tests consists of a physiological recorder that assesses three indicators of autonomic arousal: heart rate/blood pressure, respiration, and skin conductivity. ... Rate and depth of respiration are measured by pneumographs wrapped around a subject's chest.

Should polygraphs be used in interrogation?

Because the results of a polygraph test can mean many things and are so unreliable in detecting actual lies, they do not rise to the level of reliability required for scientific evidence in a courtroom and polygraph test results are usually inadmissible as evidence.