Polygraphs, commonly known as lie detectors, can be synonymous with other terms such as lie detection tests, truth verifiers, or deception detectors. These tests are used to detect physiological changes in the body related to deception, like changes in breathing, blood pressure, and sweating. The results of polygraphs are often used by law enforcement agencies and in criminal investigations to determine the truthfulness of individuals. However, their accuracy has been debated, with many experts arguing that they are not always reliable. Despite their controversy, polygraphs remain a popular tool in investigations attributed to their ability to provide vital insight into the truthfulness of an individual.