January 13, 2026

Pneumographs are an essential polygraph accessory, working alongside other attachments to collect vital physiological data during lie detector tests. Understanding their mechanics is critical in conducting a credible polygraph exam.   But first, it’s important to know the specific physiological data that pneumographs record.   Here’s a comprehensive guide to how pneumographs work.   Unpacking Pneumographs  Pneumographs are one of the three […]

The polygraph has gradually grown into a widely used investigative tool, assisting examiners in assessing credibility and supporting investigative processes.  While critics abound, research and professional standards indicate that polygraph examinations can be a useful and reasonably reliable investigative aid when properly administered by trained examiners. That explains why a technique previously exclusive to law enforcement has now expanded into