Polygraph: meaning, definitions and examples

Etymology

• The word 'polygraph' comes from Greek roots: 'poly' meaning many and 'graph' meaning to write, hinting at its function of tracking multiple body signals.
• Originally, the term referred to a machine that could write multiple copies of a document at once before evolving to its current meaning related to lie detection.

History

• The first modern polygraph was invented by John Augustus Larson in 1921, primarily used in criminal investigations.
• In its early days, the machine faced skepticism and challenges regarding its accuracy, leading to decades of debate over its reliability.

Legal Aspects

• The admissibility of polygraph results in court varies by country and jurisdiction, with many considering them inadmissible due to their potential unreliability.
• Some employers use polygraph tests for security clearance or sensitive positions, although their ethical implications are often debated.

Pop Culture

• Polygraphs have been featured in numerous movies and TV shows, often depicted as foolproof lie detectors, which can result in skewed public perceptions.
• In detective stories and crime dramas, polygraph tests are frequently used as a narrative device to reveal character motivations or truths.

Science

• The polygraph measures physiological responses such as heart rate, blood pressure, and skin conductivity, positing a connection between these changes and emotional states.
• Studies show that while polygraphs can indicate stress, they are not infallible predictors of deception, as various factors can impact results.

Positioned at #22,341, this word is part of extensive vocabulary. It's relatively rare in general usage but may be important in specific fields or formal writing.

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