• Entry
  • Entries A-Z

An instrument, also called a polygraph, used to record physiological reactions during questioning. Involuntary physical reactions (e.g., blood pressure increases, pulse, perspiration, and respiration) are measured to indicate whether the answers are truthful. Most legal jurisdictions do not allow the use of polygraph results in court testimony because their accuracy is questionable. However, it is a useful tool in law enforcement investigations and in some treatment settings.

See also
locked icon

Sign in to access this content

Get a 30 day FREE TRIAL

  • Watch videos from a variety of sources bringing classroom topics to life
  • Read modern, diverse business cases
  • Explore hundreds of books and reference titles