Elaad's 1997 study revealed that examiner knowledge of crime-relevant items weakens GKT detection, while motivation amplifies it — reshaping polygraph best practices.
Read Article →Explore the psychophysiological science behind the CQT polygraph: differential salience, ANS responses, three measurement channels, and 89% mean accuracy confirmed by APA meta-analyses.
Read Article →Complete guide to cardiovascular arousal in polygraph testing. Learn how heart rate, blood pressure, and blood volume changes are measured and scored.
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 →PDD is the scientific discipline behind polygraph testing. Learn its validated techniques, accuracy rates of up to 95%, professional standards, and why it matters.
Read Article →John Furedy's decades of CQT research at the University of Toronto raised methodological standards in polygraph science and shaped international legal discourse.
Read Article →How Cleve Backster's Zone Comparison Test transformed polygraph science while his plant perception claims challenged the profession's credibility.
Read Article →Discover how Eitan Elaad's decades of CIT research from within Israel's police force shaped modern polygraph science with landmark field studies and examiner bias…
Read Article →Gordon Barland's 1975 field validity study and DoDPI research established the empirical standards federal agencies and polygraph professionals rely on today.
Read Article →How Raskin & Kircher at the University of Utah developed the Utah ZCT, created the Computerized Polygraph System, and transformed modern polygraph science.
Read Article →How the 1983 OTA report evaluated polygraph science, found 82-88% accuracy, and catalyzed the EPPA — transforming polygraph standards forever.
Read Article →Explore how 1970s Congressional hearings, academic research, and state legislation transformed polygraph science and led to the Employee Polygraph Protection Act.
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 Backster's Either-Or Rule revolutionized polygraph scoring with a binary comparison model that increased correct decisions from 70% to 80%.
Read Article →Discover how frequentist and Bayesian statistics shape polygraph scoring, accuracy validation, and courtroom admissibility. Essential reading for examiners.
Read Article →Discover how p-values and statistical inference underpin polygraph testing accuracy, scoring algorithms, and research validation in this expert guide.
Read Article →Discover the nine key research methods behind polygraph science, from field studies and lab experiments to meta-analyses and Monte Carlo simulations.
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