CHILD DEVELOPMENT PEDAGOGY

Detailed explanation-1: -But while often accurate, polygraphs are not foolproof, experts say. “Proponents will say the test is about 90 percent accurate. Critics will say it’s about 70 percent accurate, ” said Frank Horvath of the American Polygraph Association.

Detailed explanation-2: -Despite an accuracy rate between 78% and 90%, empirical studies in real world conditions are necessary to estimate the usefulness of this technology in detecting deception (Spence, 2008).

Detailed explanation-3: -Most psychologists agree that there is little evidence that polygraph tests can accurately detect lies.

Detailed explanation-4: -Polygraphs measure physiological arousal factors, including heart rate, blood pressure, respiration, perspiration, and skin conductivity. The theory of the lie detector test is that these physiological responses will be different when the subject is truthful versus when the subject lies.