Costa Rica debates reliability of polygraph tests for government screening

Columnist Eduardo Ulibarri explains that polygraph measurements are not foolproof. He notes that “all physiological indicators measured by the polygraph can be altered by conscious cognitive or physical effort, and all physiological responses associated with deception can have other causes. Therefore, it is possible for examined persons to take conscious actions that generate false readings.” The piece argues that the government’s reliance on the polygraph as an infallible tool to identify dishonest officials is misplaced and calls for greater scrutiny of its use.

The article highlights the need for transparency and cautions against using the device as a definitive arbiter of truth in public administration.