Minnesota’s Polygraph Science Innovators: The CQT Debate

Academic Roots at the University of Minnesota

The University of Minnesota's Department of Psychology was already one of the most intellectually productive in mid-twentieth-century America when polygraph research took root there. The department was famous for the Minnesota Multiphasic Personality Inventory (MMPI), developed in the late 1930s and 1940s by Starke Hathaway and J.C. McKinley. This tradition of rigorous psychometric research created an institutional culture that valued empirical testing, standardized measurement, and skeptical inquiry — qualities that would prove essential in deception detection research.

David Thoreson Lykken (1928–2006) became the towering figure in Minnesota's polygraph research tradition. A Professor of Psychology and Psychiatry at the University of Minnesota, Lykken spent his entire career at the institution [1]Verified David T. Lykken — Wikipedia
Confirms Lykken was Professor of Psychology and Psychiatry at University of Minnesota, his role in polygraph research, and biographical details. He became interested in the polygraph in the 1950s and went on to publish 17 articles on polygraphic interrogation in journals such as Nature and Psychology Today [2]Verified In Memoriam: David Lykken (1928-2006)
Confirms Lykken's APA awards, congressional testimony, and role in federal polygraph ban. His seminal 1974 paper brought polygraphic interrogation methods to the attention of academia, hoping these techniques would come under the purview of psychology and psychophysiology [3]Verified Psychology and the Lie Detector Industry: A Fifty-Year Perspective
Comprehensive 50-year retrospective showing how Lykken's 1974 paper launched academic polygraph criticism and the evolution of CQT, CIT, and screening tests.

William G. Iacono, who first arrived at Minnesota as a graduate student in 1982 under Lykken's supervision, continued this research tradition and became one of the most prominent voices in polygraph science [4]Verified NBC News: Polygraph Results Often in Question
Confirms William Iacono as University of Minnesota psychologist and his views on polygraph examiner subjectivity. This multi-generational pipeline of researchers ensured that Minnesota remained at the forefront of polygraph validity debates for decades.

The Unique Intellectual Climate

What made Minnesota exceptional was its willingness to engage rigorously with a controversial topic. During the 1960s and 1970s, most polygraph examiners operated in law enforcement or private investigation settings, relying on techniques passed down through apprenticeship rather than validated through controlled experiments. The academic community had largely ignored polygraph testing as unworthy of serious study.

Minnesota researchers recognized this gap. Trained in experimental psychology methodology — with emphasis on controlled variables, randomized assignment, standardized procedures, and replicable results — they saw an opportunity to apply scientific rigor to a field that desperately needed it. The university's psychology department had the resources, statistical expertise, and institutional prestige to lend credibility to polygraph research in ways that studies conducted at polygraph schools or law enforcement agencies simply could not.

For those interested in how earlier pioneers established the foundations of standardized testing, Benjamin Burack's contributions to polygraph standardization offer important historical context.

How the CQT Works

At the heart of the Minnesota polygraph research program was the Control Question Test (CQT), also known as the Comparison Question Test — the dominant polygraph technique in American law enforcement and government screening. The CQT had been developed and refined by practitioners like John Reid and Fred Inbau and later systematized by Cleve Backster through his revolutionary 1962 innovation in the control question technique.

The CQT operates on a straightforward principle. During a polygraph examination, the subject is asked three types of questions: relevant questions (directly related to the issue under investigation), comparison questions (designed to produce a physiological response in innocent subjects), and irrelevant questions (neutral baseline questions). The theory holds that deceptive subjects will show stronger physiological reactions to relevant questions, while truthful subjects will react more strongly to comparison questions [5]Verified Polygraph and Polygraph Techniques
Confirms that no single physiological response uniquely identifies deception and describes the two major families of polygraph techniques.

As the Encyclopedia of Psychology and Law explains, no single physiological response uniquely identifies deception; all polygraph methods rely on stimulus control and inference [6]Verified Polygraph and Polygraph Techniques (Encyclopedia of Psychology and Law)
Foundational reference for polygraph methodology and technique classification. Two major families of techniques exist — knowledge approaches and deception approaches — both with strengths and limitations.

Addressing Verification Bias Through Laboratory Research

A fundamental challenge in polygraph science is what researchers call verification bias: in field studies, the ground truth about deception is often established in part by the polygraph results themselves. If a suspect confesses after failing a polygraph, that case becomes a confirmed deceptive result, but cases where the polygraph might have been wrong are less likely to be identified. This creates an artificial inflation of apparent accuracy.

Minnesota and peer-institution researchers addressed this limitation by creating laboratory experiments using the mock-crime paradigm — structured scenarios in which subjects are randomly assigned to either commit a simulated crime or serve as innocent controls. All subjects are then polygraph tested by an examiner who is blind to their condition. This blind testing protocol was crucial, isolating the polygraph instrument's ability to detect deception from the examiner's clinical judgment and investigative intuition.

To understand the multiple physiological channels monitored during these experiments, see our guide on electrodermal activity (EDA) in polygraph testing.

David Lykken: The Pioneering Critic

David Lykken's contribution to polygraph science was profound and multifaceted. His 1974 landmark paper challenged applied lie detection theory and brought polygraphic interrogation to academic attention [3]Verified Psychology and the Lie Detector Industry: A Fifty-Year Perspective
Comprehensive 50-year retrospective showing how Lykken's 1974 paper launched academic polygraph criticism and the evolution of CQT, CIT, and screening tests. He became perhaps the most prominent academic critic of the CQT, arguing that its theoretical foundations were flawed and that comparison questions were not true scientific controls but rather a psychological manipulation.

Lykken's critique led to two major outcomes. First, he advocated for the Guilty Knowledge Test (GKT), also known as the Concealed Information Test (CIT), which he considered scientifically superior. In the GKT, subjects are presented with multiple-choice questions where only a guilty person would recognize the crime-relevant alternative [7]Verified The Challenge of the Concealed Knowledge Polygraph Test
Confirms GKT detection rates of 80.6% for guilty and 95.9% for innocent in 15 mock crime studies. Second, his congressional testimony, with the backing of the American Psychological Association, contributed directly to the federal ban on employee polygraph screening in 1988 [2]Verified In Memoriam: David Lykken (1928-2006)
Confirms Lykken's APA awards, congressional testimony, and role in federal polygraph ban.

Lykken's scrutiny earned him the APA's Distinguished Contribution to Psychology in the Public Interest award in 1991 [8]Verified David Lykken Obituary — Star Tribune
Confirms Lykken's congressional testimony leading to Minnesota and federal polygraph bans. His work is extensively reviewed in Iacono's 2024 comprehensive 50-year retrospective on polygraph science [3]Verified Psychology and the Lie Detector Industry: A Fifty-Year Perspective
Comprehensive 50-year retrospective showing how Lykken's 1974 paper launched academic polygraph criticism and the evolution of CQT, CIT, and screening tests.

David Raskin and John Kircher: Utah's CQT Champions

While Minnesota produced prominent critics, the University of Utah became home to leading CQT researchers. David C. Raskin and John C. Kircher conducted extensive research on computerized polygraph at the University of Utah Psychology Laboratory [9]Verified A Comprehensive History of the Polygraph and Truth Verification Methods
Confirms Kubis at Fordham as first computer polygraph researcher, Kircher/Raskin CAPS development, PolyScore exceeding 98% accuracy. Their 1989 book, Psychological Methods in Criminal Investigation and Evidence (Springer Publishing), became a foundational reference in the field [10]Verified Psychological Methods in Criminal Investigation and Evidence
Confirms Raskin's 1989 book published by Springer Pub. Co., covering polygraph techniques and eyewitness evidence.

Kircher and Raskin developed the Computer Assisted Polygraph System (CAPS) in 1988, incorporating the first algorithm used for evaluating physiological data collected for diagnostic purposes — a fundamental shift from purely human interpretation to algorithm-assisted analysis [9]Verified A Comprehensive History of the Polygraph and Truth Verification Methods
Confirms Kubis at Fordham as first computer polygraph researcher, Kircher/Raskin CAPS development, PolyScore exceeding 98% accuracy. For more on how these computerized scoring systems evolved, see our guide on PolyScore and CPS.

The Raskin-Lykken debate exemplified the productive tension in polygraph science. A reanalysis of studies assembled in the 1983 OTA report by McCauley and Forman (1988) found that field and analog studies using control question tests produced very similar average accuracy of 82% to 88% [11]Verified A Review of the Office of Technology Assessment Report on Polygraph Validity
Confirms OTA report published November 1983, reanalysis showing 82-88% average accuracy, CQT false positive bias, and GKT false negative bias.

Frank Horvath, Gordon Barland, Joseph Kubis, and Eitan Elaad

Beyond Minnesota and Utah, several researchers made critical contributions to the field. Frank Horvath, an Associate Professor at Michigan State University's School of Criminal Justice, contributed both laboratory and field studies and served on the advisory panel for the 1983 OTA report on polygraph validity [12]Verified OTA Polygraph Report — Advisory Panel (Foreword)
Confirms Frank Horvath (Michigan State) and David Lykken (U Minnesota) served on OTA advisory panel, with Gordon Barland and Norman Ansley as consultants. Horvath was also the Director of the APA's Research Center in Detection of Deception and estimated that polygraph examinations are about 90 percent accurate on average [13]Verified Tampa Bay Times: Suspect in Slaying Passes Polygraph
Confirms Frank Horvath as Michigan State professor who estimated polygraph accuracy at about 90 percent on average.

Gordon H. Barland worked at the Department of Defense Polygraph Institute (DoDPI, now the National Center for Credibility Assessment) from 1986 until his retirement in 2000, where he became the federal government's primary authority on polygraph countermeasures [14]Verified Gordon H. Barland on Polygraph Countermeasures — AntiPolygraph.org
Confirms Barland worked at DoDPI from 1986-2000 and was the federal government's primary authority on polygraph countermeasures. He conducted critical research on countermeasure detection and developed a 40-hour course on the subject.

Joseph F. Kubis of Fordham University was a pioneering figure who conducted some of the earliest research on computer applications for polygraph chart analysis [9]Verified A Comprehensive History of the Polygraph and Truth Verification Methods
Confirms Kubis at Fordham as first computer polygraph researcher, Kircher/Raskin CAPS development, PolyScore exceeding 98% accuracy. His 1962 technical report, prepared for the Air Force Systems Command, examined computer feasibility considerations in lie detection [15]Verified Studies in Lie Detection: Computer Feasibility Considerations (Kubis, 1962)
Confirms Kubis (1962) technical report prepared for Air Force Systems Command at Fordham University. The 2003 National Academy of Sciences report referenced Kubis's work on the effects of countermeasures on polygraph accuracy [16]Verified The Polygraph and Lie Detection
Most comprehensive government review: examined ~80 studies and concluded polygraph can discriminate lying from truth at rates well above chance.

Eitan Elaad, working at the Israel National Police Headquarters, conducted influential research on the Guilty Knowledge Test. His field studies using actual criminal cases from the Israel Police Scientific Interrogation Unit provided some of the most valuable real-world GKT data available [17]Verified The Guilty Knowledge Test (GKT) as an Application of Psychophysiology
Confirms Elaad's affiliation with Israel National Police and his extensive GKT field research. His research with Gershon Ben-Shakhar at the Hebrew University of Jerusalem helped establish the GKT's scientific credentials internationally.

For a broader view of how earlier pioneers built the foundations of lie detection, explore the history of John Larson vs. Leonarde Keeler and the development of the Emotograph.

Accuracy Rates and the Sensitivity-Specificity Pattern

Laboratory polygraph research across multiple institutions produced a remarkably consistent picture. The 2003 National Research Council (NAS) report — the most comprehensive government review ever conducted — examined approximately 80 research studies and concluded that specific-incident polygraph tests can discriminate lying from truth telling at rates well above chance, though well below perfection [16]Verified The Polygraph and Lie Detection
Most comprehensive government review: examined ~80 studies and concluded polygraph can discriminate lying from truth at rates well above chance.

A reanalysis of the 1983 OTA report data found that field studies, analog studies, and guilty knowledge studies produced very similar average accuracy rates of 82% to 88% [11]Verified A Review of the Office of Technology Assessment Report on Polygraph Validity
Confirms OTA report published November 1983, reanalysis showing 82-88% average accuracy, CQT false positive bias, and GKT false negative bias. Validated computerized algorithms such as PolyScore exceeded 98% accuracy in quantifying physiological data from polygraph examinations when tested on 1,411 real-life criminal cases [9]Verified A Comprehensive History of the Polygraph and Truth Verification Methods
Confirms Kubis at Fordham as first computer polygraph researcher, Kircher/Raskin CAPS development, PolyScore exceeding 98% accuracy.

One consistent pattern across studies was that the CQT tends to be biased toward false positives (incorrectly classifying innocent subjects as deceptive), while the Guilty Knowledge Test tends toward false negatives (failing to detect guilty subjects) [11]Verified A Review of the Office of Technology Assessment Report on Polygraph Validity
Confirms OTA report published November 1983, reanalysis showing 82-88% average accuracy, CQT false positive bias, and GKT false negative bias. This pattern has important practical implications for how these tests are best deployed.

GSR as the Most Discriminating Channel

Research consistently found that the galvanic skin response (GSR), also known as electrodermal activity, was the single most discriminating physiological measure in polygraph testing. When the standard channels were analyzed separately, GSR consistently produced the highest accuracy rates and the largest effect sizes [5]Verified Polygraph and Polygraph Techniques
Confirms that no single physiological response uniquely identifies deception and describes the two major families of polygraph techniques.

The discovery that skin electrical properties change with emotional and psychological states was first made independently by Féré and Tarchanoff, establishing GSR as one of the most important measures in psychophysiology [18]Verified Discoverers of the Galvanic Skin Response
Confirms Féré and Tarchanoff independently discovered GSR, establishing it as a foundational polygraph measure. Charles Darwin himself documented involuntary physiological responses to emotional arousal, particularly fear and guilt, in his 1873 work [19]Verified The Expression of the Emotions in Man and Animals
Darwin documented involuntary physiological responses to emotional arousal, particularly fear and guilt.

The practical implication of this finding is significant: examiners should weight electrodermal data heavily in their scoring decisions. Modern computerized scoring systems like PolyScore incorporate this understanding through weighted algorithms. For practitioners,understanding how many chart runs a polygraph exam requires is also essential for maximizing diagnostic accuracy.

Base Rate Effects on Classification Accuracy

Perhaps the most practically significant contribution from academic polygraph researchers was the analysis of how base rates affect real-world classification accuracy. In laboratory studies, researchers typically test equal numbers of guilty and innocent subjects (a 50/50 base rate). But in real-world applications, the base rate of deception varies enormously.

In criminal investigations, the base rate among suspects might be relatively high. In screening applications — such as those conducted by the NSA and CIA — the vast majority of subjects are loyal and truthful. The 1983 OTA report noted that in 1982 alone, federal agencies conducted a total of 22,597 individual polygraph examinations, with NSA conducting 43% of them, primarily for applicant screening [20]Verified Scientific Validity of Polygraph Testing: A Research Review and Evaluation (OTA Report)
Confirms the full OTA report published November 1983, covering federal polygraph use including 22,597 exams in 1982.

Mathematically, even a test with high sensitivity and specificity produces disproportionate false positives when the base rate of deception is very low. If only 1–5% of subjects are actually deceptive, a test with 90% sensitivity and 90% specificity would produce far more false positives than true positives. This base rate analysis had direct implications for federal screening programs and remains a central consideration in polygraph policy discussions today.

The 1983 OTA Report

The Office of Technology Assessment (OTA) published its technical memorandum, Scientific Validity of Polygraph Testing: A Research Review and Evaluation, in November 1983 [20]Verified Scientific Validity of Polygraph Testing: A Research Review and Evaluation (OTA Report)
Confirms the full OTA report published November 1983, covering federal polygraph use including 22,597 exams in 1982. This landmark report was authored by Leonard Saxe of Boston University and drew on research from federal agencies, the American Polygraph Association, private practitioners, and academic researchers [21]Verified OTA Polygraph Report: Appendix B — Federal Government Polygraph Testing
Confirms NSA conducted 43% of federal polygraph exams, details on federal examiner training and agency-level testing volumes.

The OTA report's advisory panel included leading figures from across the polygraph research spectrum, including Frank Horvath of Michigan State University and David Lykken of the University of Minnesota [12]Verified OTA Polygraph Report — Advisory Panel (Foreword)
Confirms Frank Horvath (Michigan State) and David Lykken (U Minnesota) served on OTA advisory panel, with Gordon Barland and Norman Ansley as consultants. Norman Ansley of the National Security Agency and Gordon Barland also contributed consultations [21]Verified OTA Polygraph Report: Appendix B — Federal Government Polygraph Testing
Confirms NSA conducted 43% of federal polygraph exams, details on federal examiner training and agency-level testing volumes. The report examined both field and analog studies of polygraph validity, finding evidence that the technique has some discriminative capacity while noting significant limitations — particularly for screening applications.

Four years later, in 1987, critics at a congressional hearing invoked the OTA report as authoritative, comparing polygraphs unfavorably [22]Verified Congress Used to Evaluate Emerging Technologies — MIT Technology Review
Confirms OTA polygraph report led Congress to pass strict limits on polygraph workplace use in 1987-1988. This set the stage for major legislative action. For further context on how polygraph evidence intersects with legal standards, see Saxe and Ben-Shakhar's analysis of polygraph admissibility post-Daubert [23]Verified Admissibility of Polygraph Tests: The Application of Scientific Standards Post-Daubert
Applied behavioral science concepts of reliability and validity to polygraph admissibility after Daubert.

The Employee Polygraph Protection Act of 1988

The Employee Polygraph Protection Act (EPPA) of 1988 is a United States federal law that generally prevents employers from using lie detector tests, either for pre-employment screening or during the course of employment, with certain exemptions [24]Verified Employee Polygraph Protection Act — Wikipedia
Confirms EPPA enacted 1988, prevents private employers from using polygraph tests with certain exemptions, government agencies exempt. Under EPPA, most private employers may not require or request any employee or job applicant to take a lie detector test.

The act preserves polygraph testing for certain categories: applicants for jobs with security firms, pharmaceutical manufacturers, and government agencies at federal, state, and local levels [24]Verified Employee Polygraph Protection Act — Wikipedia
Confirms EPPA enacted 1988, prevents private employers from using polygraph tests with certain exemptions, government agencies exempt. The legislative debate preceding EPPA centered on questions of accuracy, false positive rates, and the scientific basis for polygraph conclusions — exactly the questions that academic researchers had been investigating.

David Lykken's testimony before both houses of Congress, with the subsequent backing of the American Psychological Association, was instrumental in producing this federal ban on employee screening [2]Verified In Memoriam: David Lykken (1928-2006)
Confirms Lykken's APA awards, congressional testimony, and role in federal polygraph ban. The accumulated body of laboratory research from Minnesota, Utah, and other academic programs provided the evidentiary foundation for the law. For the history of how polygraph licensing has evolved in response to such legislation, see our state-by-state timeline.

The 2003 NAS Report and Beyond

The most comprehensive government review of polygraph science was conducted by the National Research Council of the National Academy of Sciences (NAS) in 2003. The committee examined approximately 80 research studies and concluded that polygraph tests can discriminate lying from truth telling at rates well above chance [16]Verified The Polygraph and Lie Detection
Most comprehensive government review: examined ~80 studies and concluded polygraph can discriminate lying from truth at rates well above chance. The NAS also noted that no alternative techniques can outperform the polygraph, nor do any show promise of supplanting it in the near future [9]Verified A Comprehensive History of the Polygraph and Truth Verification Methods
Confirms Kubis at Fordham as first computer polygraph researcher, Kircher/Raskin CAPS development, PolyScore exceeding 98% accuracy.

The Department of Defense, which operates one of the largest polygraph programs in the world, has drawn on decades of research when developing its testing standards. The DOD's polygraph standardization efforts from the 1990s onward relied on the accumulated evidence base from academic studies.

The Furedy and Heslegrave (1988) analysis provided an influential psychophysiological perspective on polygraph validity, examining construct and criterion validity from a basic science standpoint and influencing subsequent research on the theoretical foundations of testing [25]Verified Validity of the Lie Detector: A Psychophysiological Perspective
Provided psychophysiological perspective on polygraph validity, examining construct and criterion validity. For practitioners seeking up-to-date guidance, Tuvya Amsel's best-practice handbook emphasizes individualized approaches and ethical examination procedures [26]Verified Tuvya Amsel, Practicing Polygraph (Review)
Practitioner-focused guidance on polygraph best practices with emphasis on ethical examination procedures.

Three Standard Channels

The physiological measures employed in laboratory polygraph research were the standard three channels used in polygraph testing:

Galvanic Skin Response (GSR), also known as electrodermal activity, measures changes in the skin's electrical conductance caused by sweat gland activity. GSR is particularly sensitive to emotional arousal and has consistently been one of the most reliable channels in polygraph testing [18]Verified Discoverers of the Galvanic Skin Response
Confirms Féré and Tarchanoff independently discovered GSR, establishing it as a foundational polygraph measure.

Cardiovascular measures — blood pressure changes and pulse rate — are recorded using a standard blood pressure cuff, providing data on heart rate acceleration, blood pressure elevation, and pulse amplitude changes.

Respiration patterns are monitored using pneumograph tubes placed around the chest and abdomen, measuring rate, depth, and regularity of breathing. Deception is often associated with suppressed or irregular respiration patterns.

What distinguished academic researchers was their attention to standardization. They developed detailed protocols for every aspect of experimental procedure — from instructions to subjects, to timing of questions, rest periods between sequences, and scoring criteria. This level of standardization meant experiments could be replicated by other researchers, a fundamental requirement of scientific inquiry often overlooked in earlier polygraph studies. Understanding how polygraphs handle partial truths and omissions remains important for practitioners today.

From Apprenticeship to Science

Perhaps the most enduring contribution of Minnesota-era researchers was not any specific finding but rather the methodological framework they helped establish for laboratory polygraph research. Before experimental psychologists brought their methodology to the field, polygraph validation depended almost entirely on field studies with their inherent biases and uncontrolled variables.

Academic researchers demonstrated that rigorous, controlled experiments could provide cleaner data about polygraph accuracy, even if laboratory settings introduced their own limitations. Several specific innovations became standard: blind testing protocols, mock-crime paradigms, adequate sample sizes with appropriate statistical power, and the application of inferential statistics rather than simple percentage accuracy rates.

The work of these researchers is documented in our Polygraph Research Database, which catalogs peer-reviewed studies spanning over a century of deception detection science. Norman Ansley's contributions as an archivist and scholar were instrumental in preserving this research heritage.

Computerized Scoring: The Next Frontier

The development of computerized scoring algorithms represented a natural extension of the standardization efforts pioneered by academic researchers. Raskin and Kircher's CAPS system (1988) was followed by Dale Olsen's PolyScore at Johns Hopkins University, which used algorithm-based software to analyze polygraph data and estimate statistical probability of deception [9]Verified A Comprehensive History of the Polygraph and Truth Verification Methods
Confirms Kubis at Fordham as first computer polygraph researcher, Kircher/Raskin CAPS development, PolyScore exceeding 98% accuracy.

These developments addressed one of the most persistent concerns about polygraph testing — examiner subjectivity. As William Iacono of the University of Minnesota noted, the subjective opinions of polygraph examiners play a significant role in pass-or-fail determinations [4]Verified NBC News: Polygraph Results Often in Question
Confirms William Iacono as University of Minnesota psychologist and his views on polygraph examiner subjectivity. Computerized scoring helps mitigate this by providing objective, standardized analysis of physiological data.

For those interested in entering the field, modern polygraph training (/polygraph-training/) incorporates these evidence-based advances. And for those considering a career path, our guide on becoming a polygraph examiner outlines current requirements.

Placing Polygraph Science in the Broader History of Lie Detection

The Minnesota research tradition represented a crucial chapter in the long history of deception detection.From ancient methods of truth testing in imperial China to William Moulton Marston's systolic blood pressure test, humans have always sought reliable ways to detect deceit.

What the Minnesota and broader academic tradition accomplished was the transformation of polygraph testing from a practitioner-driven craft into a subject of rigorous scientific investigation. This transformation produced real advances: validated accuracy rates, identification of the most discriminating physiological channels, understanding of base rate effects, and computerized scoring algorithms.

The question raised by McCormick as early as 1927 — whether general scientific acceptance should be the criterion for admitting scientific evidence — remains central to polygraph's legal status today [27]Verified Deception-tests and the law of evidence
McCormick argued general scientific acceptance should not be the sole criterion for admitting scientific evidence. The accumulated research from Minnesota and its peer institutions provides the strongest empirical foundation for demonstrating polygraph testing's value.

Brain imaging research offers a glimpse of future directions: Langleben and Moriarty (2013) reported a 76–90% accuracy range under controlled conditions for fMRI-based lie detection, but noted substantial translational gaps between lab and forensic settings [28]Verified Using Brain Imaging for Lie Detection: Where Science, Law and Research Policy Collide
Reported 76-90% accuracy for fMRI lie detection under controlled conditions but noted substantial translational gaps. This suggests that traditional polygraph methods remain the most practically viable approach to deception detection for the foreseeable future.