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Text File  |  1992-09-03  |  315b  |  9 lines
  1. Instrument that records graphically certain
  2. body activities, such as thoracic and
  3. abdominal respiration, blood pressure, pulse
  4. rate, and galvanic skin response (changes in
  5. electrical resistance of the skin). Marked
  6. changes in these activities when a person
  7. answers a question may indicate that the
  8. person is lying.
  9.