Motivation And Emotion — Psychology STD 11 Humanities — Question
CBSE BoardEnglish MediumSTD 11 HumanitiesPsychologyMotivation And Emotion1 Mark
Question
What is polygraph and lie detection?
✓
Answer
Polygraph is a technique which detects small changes in the subject's nervous system, which it transduces into electrical signals that are recorded by pens resting on a moving roll of paper.
In a typical lie detector test the person being tested is first asked a series of neutral control questions to establish base line.
They are followed by questions that would indicate guilty knowledge –facts known only by the criminal.
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