Polygraphs, commonly called “lie detectors” are instruments that monitor a person’s physiological reactions. Which of the following physiological indices is/are examined during the test?

  1. Blood pressure
  2. Respiratory rate
  3. Electrodermal activity

Select the correct option from codes given below:

Answer: [D] 1, 2 & 3

Polygraphs popularly referred to as a “lie detectors”, measure and record several physiological indices such as blood pressure, pulse, respiration, and skin conductivity. It is a belief that during use of the polygraph, a deceptive answer will produce physiological responses which will be different than during normal situations.

This question is a part of GKToday's Integrated IAS General Studies Module