June 16, 2026
What Does a Polygraph Machine Look for in a Liar?
Discover the four physiological channels a polygraph monitors, how the autonomic nervous system drives deception detection, and what examiners look for.
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Tag: <span>how polygraph works</span>
June 10, 2026
Polygraph Tests in Media: Fact vs Fiction in TV & Movies
Discover how TV and movies get polygraph testing wrong. Compare 12 media myths against professional reality, with expert data from APA research.
Read Article →April 6, 2026
Polygraph Testing Procedure: Complete Four-Phase Breakdown
A complete guide to all four phases of a professional polygraph examination: pre-test interview, chart collection, post-test analysis, and follow-up.
Read Article →March 27, 2026
What Is a Polygraph Baseline Test? Purpose & Process
Discover how the polygraph baseline test records your normal physiological responses to create a personal reference point, ensuring accurate lie detection results.
Read Article →March 27, 2026
Polygraph Cardiograph Channel: Heart Data Explained
Learn how the polygraph cardiograph channel measures blood pressure changes, heart rate, and pulse amplitude to detect deception during lie detector testing.
Read Article →March 27, 2026
What Is Electrodermal Activity (EDA)? Plain-Language Guide
Learn what electrodermal activity (EDA) is, how polygraph finger sensors measure skin conductance, and why EDA is the most diagnostically valuable polygraph channel.
Read Article →March 27, 2026
Pretest Interview in a Polygraph Exam: Complete Guide
Everything you need to know about the polygraph pretest interview: what happens, how long it lasts, your rights, and why it matters for accuracy.
Read Article →March 27, 2026
What Is the Acquaintance Test in Polygraph? Full Guide
Learn how the acquaintance test calibrates your polygraph exam. Covers procedures, formats, APA standards, and how this step improves accuracy.
Read Article →March 26, 2026
What Questions Can You Ask in a Private Lie Detector Test?
Learn what questions you can ask in a private lie detector test, including question limits, valid formats, off-limits topics, and how examiners craft effective…
Read Article →February 24, 2026
How a Polygraph Works: Science, Sensors & Process
Learn how a polygraph measures breathing, blood pressure, sweat & movement to detect deception. Science, sensors, accuracy data & the full exam process.
Read Article →December 29, 2025
Complete Guide to Polygraph Testing: How Lie Detectors Work
Complete guide to polygraph testing: how lie detectors work, accuracy data from peer-reviewed research, exam preparation tips, costs, and legal admissibility.
Read Article →December 8, 2025
What Is a Lie Detector Test? Complete Polygraph Guide
Complete guide to lie detector tests: how polygraphs work, what they measure, accuracy rates up to 89-95%, the three test phases, and how to…
Read Article →October 18, 2025
Lie Detector Test Stages: Pre-Test, Test & Post-Test
Learn what happens during all three stages of a lie detector test — pre-test interview, in-test data collection, and post-test analysis — with expert…
Read Article →September 25, 2025
Understanding the Polygraph Chart: How to Read Lie Detector Data
Learn how professional polygraph examiners read and interpret polygraph charts — including all channels, scoring systems, and computer algorithms used in modern lie detection.
Read Article →July 9, 2025
Four Components of a Polygraph: Complete Technology Guide
Discover the four core components of a polygraph: pneumograph, cardiosphygmograph, galvanograph, and kymograph. Learn how each works and their role in lie detection.
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