Physiological Markers Measured on a Polygraph (Lie Detector) Indicate Changes

Multiple Choice

Physiological markers measured on a polygraph (lie detector) indicate changes in stress or anxiety and, therefore, may also indicate lying. People show great differences in their physiological responses measured on polygraphs, and some people beat the machine. Taken together, this evidence suggests that:

A) the polygraph should still be used in criminal investigations despite its problems.
B) using physiological measures to detect lying is basically a good idea.
C) investigators are often right to administer a polygraph test to suspects.
D) the polygraph may not be a good way to accurately detect lying.