Complete breakdown of every polygraph instrument: pneumograph tubes, EDA sensors, cardio-cuff, plethysmograph, motion pads, and modern AI scoring software.
Read Article →Discover how automated polygraph scoring algorithms like PolyScore, CPS, and OSS-3 achieve up to 98% deceptive detection — and the science behind them.
Read Article →Learn what spontaneous fluctuation rate means in polygraph testing, how examiners distinguish random EDA noise from genuine responses, and why it matters.
Read Article →Learn how the 10–35 second polygraph reaction window works, why this timing matters for accurate scoring, and what each physiological channel reveals during this…
Read Article →Learn how suppression responses across respiratory, electrodermal, and cardiovascular channels help polygraph examiners detect deception in chart analysis.
Read Article →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 →Discover how galvanic skin response (GSR) works in polygraph testing — the science of electrodermal activity, how sensors measure sweat gland changes, and why…
Read Article →A comprehensive guide to every data channel on a polygraph chart — what each sensor measures, how examiners interpret tracings, and why multichannel recording…
Read Article →Master the psychophysiology behind polygraph data: ANS activation, EDA, cardiovascular dynamics, and respiratory mechanics for accurate, defensible examinations.
Read Article →From Féré's 1888 discovery to Keeler's 1938 three-channel polygraph: how the psychogalvanometer became the electrodermal activity sensor in every modern lie detector.
Read Article →Explore the engineering behind every polygraph sensor — pneumograph tubes, EDA electrodes, cardiosphygmograph cuffs, and plethysmograph components explained.
Read Article →Complete guide to the Guilty Knowledge Test (GKT/CIT): orienting response science, accuracy data, Japan's operational use, scoring protocols, and examiner best practices.
Read Article →Discover how alcohol affects all three polygraph channels — cardiovascular, respiratory, and electrodermal — and why abstinence before testing is essential.
Read Article →Comprehensive guide to how diabetes affects polygraph accuracy, including blood sugar management protocols, neuropathy risks, and examiner best practices.
Read Article →Discover how beta-blockers, benzodiazepines, antidepressants, stimulants, and other medications affect polygraph results. Evidence-based guide for examinees and examiners.
Read Article →Comprehensive guide to electrodermal activity (EDA) in polygraph testing — covering skin conductance science, measurement methods, scoring systems, and modern instrumentation.
Read Article →Explore the science behind polygraph testing: cognitive load theory, the autonomic nervous system, and the three physiological channels that make deception detection possible.
Read Article →Master APA standards for polygraph instrument calibration, sensor maintenance, environmental control, and quality documentation for reliable results.
Read Article →Learn how baseline responses in polygraph testing are established, why they matter for accuracy, and how examiners use them to interpret physiological data reliably.
Read Article →Learn how temperature, noise, lighting, privacy, and equipment placement affect polygraph accuracy. APA-aligned environmental guidelines for optimal testing.
Read Article →Compare analog and computerized polygraph systems: sensors, scoring algorithms, manufacturers, and accuracy data. Complete technical guide for examiners.
Read Article →Discover how the psychogalvanometer measures skin conductance changes caused by emotional arousal — and why EDA is a core channel in every modern polygraph.
Read Article →Deep dive into automated polygraph scoring: PolyScore & CPS algorithms, logistic regression models, electrodermal dominance, and classification accuracy from Slavkovic's research.
Read Article →Learn how polygraph examiners use psychological profiling to establish physiological baselines and detect deception across respiration, EDA, and cardiovascular channels.
Read Article →Explore the science of applied psychophysiology in polygraph testing: autonomic arousal, construct validity, validated techniques, and ethical standards.
Read Article →Complete technical guide to Lafayette's LX4000 & LX5000 polygraph systems — specs, EDA circuits, daughter card upgrades, safety compliance, and hardware revisions.
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