Marston’s Harvard Deception Experiments: 1915 Origins

A Discipline in Transformation

To understand what William Moulton Marston accomplished, you need to appreciate the intellectual environment at Harvard University during the second decade of the twentieth century. American psychology was pulling itself away from philosophy and positioning itself as an empirical science capable of practical application in medicine, law, education, and industry.

Harvard's psychology department was among the most prestigious in the world. Founded by William James, it had established a tradition of combining rigorous experimentation with broad philosophical inquiry. By the time Marston enrolled at Harvard in 1911 [1]Verified William Moulton Marston
Confirms Marston born May 9, 1893 in Cliftondale, Saugus, Massachusetts; Harvard degrees (B.A. 1915, LL.B. 1918, PhD 1921); creation of systolic blood pressure test and Wonder Woman, the department was led by Hugo Münsterberg, a German-American psychologist whom James had recruited from the University of Freiburg in 1892 to chair the psychology laboratory [2]Verified Hugo Münsterberg
Confirms Münsterberg came to Harvard in 1892, recruited by William James; PhD under Wundt at Leipzig; death in 1916 during a lecture; authored On the Witness Stand (1908). Münsterberg had earned his PhD under Wilhelm Wundt at the University of Leipzig (1885) and a medical degree from the University of Heidelberg (1887) before establishing a psychology laboratory at Freiburg [2]Verified Hugo Münsterberg
Confirms Münsterberg came to Harvard in 1892, recruited by William James; PhD under Wundt at Leipzig; death in 1916 during a lecture; authored On the Witness Stand (1908). He was an evangelist for 'applied psychology' — the idea that laboratory findings should be exported directly into real-world settings such as courtrooms, factories, and clinics [2]Verified Hugo Münsterberg
Confirms Münsterberg came to Harvard in 1892, recruited by William James; PhD under Wundt at Leipzig; death in 1916 during a lecture; authored On the Witness Stand (1908).

The Harvard Psychological Laboratory occupied rooms in Emerson Hall, equipped with the standard apparatus of the era: kymographs for recording physiological traces, galvanometers, chronoscopes for measuring reaction times, and various devices for presenting stimuli. Students worked in close quarters with their advisors, designing experiments that reflected the intellectual concerns of their mentors.

European Precedents in Deception Detection

The broader landscape of deception detection research already had significant precedents. Cesare Lombroso had used a plethysmograph to detect lying in criminal suspects as early as the 1890s in Italy [3]Verified Cesare Lombroso's Plethysmograph: The First Lie Detector Experiment
Confirms Lombroso's pioneering use of plethysmography for deception detection in the 1890s. Angelo Mosso and his brother Domenico had used plethysmographic measurements to record blood volume changes associated with emotional states. In Austria, Carl Jung's word association experiments demonstrated that emotionally charged stimuli produced measurable physiological and behavioral responses.

Remarkably, Max Wertheimer — later famous as a founder of Gestalt psychology — had completed his doctoral dissertation at the University of Würzburg in 1904 on the use of word association techniques for determining the guilt or innocence of defendants in criminal cases [4]Verified Max Wertheimer
Confirms Wertheimer's 1904 PhD at Würzburg involving development of a lie detector and word association method for studying testimony. Wertheimer's PhD included what Britannica describes as developing a lie detector for the objective study of testimony [4]Verified Max Wertheimer
Confirms Wertheimer's 1904 PhD at Würzburg involving development of a lie detector and word association method for studying testimony. In Italy, Vittorio Benussi published research in 1914 demonstrating that respiration patterns changed during deception.

Marston entered this environment as an intellectually ambitious and confident young man. Born on May 9, 1893, in the Cliftondale section of Saugus, Massachusetts [1]Verified William Moulton Marston
Confirms Marston born May 9, 1893 in Cliftondale, Saugus, Massachusetts; Harvard degrees (B.A. 1915, LL.B. 1918, PhD 1921); creation of systolic blood pressure test and Wonder Woman, he had enrolled at Harvard as an undergraduate in 1911 and graduated Phi Beta Kappa with his A.B. in 1915 [1]Verified William Moulton Marston
Confirms Marston born May 9, 1893 in Cliftondale, Saugus, Massachusetts; Harvard degrees (B.A. 1915, LL.B. 1918, PhD 1921); creation of systolic blood pressure test and Wonder Woman. He was drawn to the most dramatic questions in applied psychology — especially the detection of deception — and found in Münsterberg a mentor who encouraged precisely this kind of practically oriented research. For a comprehensive look at Marston's life and legacy, see our profile of William Moulton Marston: Lie Detector Pioneer & Wonder Woman.

The Intellectual Architect

No account of Marston's Harvard experiments can be complete without understanding the outsized influence of Hugo Münsterberg. Münsterberg was not merely Marston's academic supervisor — he was the intellectual architect of the entire project. His 1908 book On the Witness Stand argued, in accessible and sometimes sensational terms, that psychology could revolutionize the legal system by providing objective tools to evaluate witness testimony, detect lies, and assess criminal responsibility [2]Verified Hugo Münsterberg
Confirms Münsterberg came to Harvard in 1892, recruited by William James; PhD under Wundt at Leipzig; death in 1916 during a lecture; authored On the Witness Stand (1908).

Münsterberg catalogued the ways in which human testimony was unreliable. Witnesses misperceived events, constructed false memories, succumbed to suggestion, and sometimes deliberately lied. The legal system, Münsterberg argued, had no scientific method for distinguishing between honest and dishonest testimony. Psychology, with its growing toolkit of experimental methods, could fill this gap [2]Verified Hugo Münsterberg
Confirms Münsterberg came to Harvard in 1892, recruited by William James; PhD under Wundt at Leipzig; death in 1916 during a lecture; authored On the Witness Stand (1908).

The legal community's reaction to Münsterberg's claims was hostile. John Henry Wigmore, Dean of Northwestern Law School and the preeminent evidence scholar of his day, published a devastating satirical critique in the 1909 Illinois Law Review [5]Verified You can't do that! Hugo Münsterberg and misapplied psychology
Confirms Wigmore's 1909 satirical critique of Münsterberg in the Illinois Law Review; identifies Wigmore as Dean of Northwestern Law School. Wigmore staged a fictional trial — set in the 'Superior Court of Wundt County' on April Fools' Day — in which Münsterberg was the defendant in a libel suit for damaging the legal profession's reputation [5]Verified You can't do that! Hugo Münsterberg and misapplied psychology
Confirms Wigmore's 1909 satirical critique of Münsterberg in the Illinois Law Review; identifies Wigmore as Dean of Northwestern Law School. The critique effectively set back forensic and applied psychology for years [5]Verified You can't do that! Hugo Münsterberg and misapplied psychology
Confirms Wigmore's 1909 satirical critique of Münsterberg in the Illinois Law Review; identifies Wigmore as Dean of Northwestern Law School.

Münsterberg's Death and the Transition to Langfeld

Münsterberg died suddenly on December 16, 1916, from an intracerebral hemorrhage while delivering a lecture at Radcliffe College [2]Verified Hugo Münsterberg
Confirms Münsterberg came to Harvard in 1892, recruited by William James; PhD under Wundt at Leipzig; death in 1916 during a lecture; authored On the Witness Stand (1908). His death deprived Marston of his most important mentor and most powerful advocate.

After Münsterberg's death, Marston's work continued under Herbert Sidney Langfeld, who had joined Harvard's faculty in 1910 after earning his PhD under Carl Stumpf at the University of Berlin [6]Verified Herbert Langfeld
Confirms Langfeld earned PhD under Carl Stumpf at University of Berlin in 1909; took faculty position at Harvard University. Marston himself confirmed this dual supervision in his doctoral dissertation, writing that the research 'began in the Harvard Psychological Laboratory in 1913 under Professors Munsterberg and Langfeld' [7]Verified Proving Frye as a Matter of Law, Science, and History
Confirms Marston's dissertation began under Münsterberg and Langfeld in 1913; accuracy rate of 97.1% (34/35 correct); Committee on Tests for Deception. Langfeld, who published a paper titled 'Psychophysical Symptoms of Deception' in 1921 citing Marston's undergraduate research [7]Verified Proving Frye as a Matter of Law, Science, and History
Confirms Marston's dissertation began under Münsterberg and Langfeld in 1913; accuracy rate of 97.1% (34/35 correct); Committee on Tests for Deception, was a capable but less flamboyant psychologist who specialized in aesthetics and the psychology of perception [6]Verified Herbert Langfeld
Confirms Langfeld earned PhD under Carl Stumpf at University of Berlin in 1909; took faculty position at Harvard University. He was supportive of Marston's research but did not share Münsterberg's evangelical zeal for applying psychology to the courtroom.

The Blood Pressure Insight

Marston's central contribution was his focus on systolic blood pressure as a specific physiological indicator of deception. While previous researchers had measured a variety of physiological channels — respiration, pulse volume, galvanic skin response — Marston concentrated on what he regarded as the most reliable and easily measured single parameter: the peak pressure that blood exerts against artery walls during cardiac contraction.

According to the National Academies of Sciences, Marston's wife Elizabeth Holloway Marston provided the initial inspiration for this approach when she remarked that her blood pressure rose whenever she got 'mad or excited' [8]Verified Harvard's Real 'Lasso of Truth'
Confirms Elizabeth Holloway Marston's blood pressure insight; Shepard subcommittee evaluation; wartime testing claims. This offhand comment inspired Marston's interest in the possible correlation between blood pressure and lying [8]Verified Harvard's Real 'Lasso of Truth'
Confirms Elizabeth Holloway Marston's blood pressure insight; Shepard subcommittee evaluation; wartime testing claims. Elizabeth, who earned her B.A. in psychology from Mount Holyoke College in 1915 and later a law degree from Boston University in 1918, collaborated closely on the research throughout [1]Verified William Moulton Marston
Confirms Marston born May 9, 1893 in Cliftondale, Saugus, Massachusetts; Harvard degrees (B.A. 1915, LL.B. 1918, PhD 1921); creation of systolic blood pressure test and Wonder Woman.

Marston's specific hypothesis was that deception would produce a detectable rise in systolic blood pressure. He reasoned that the act of deliberately concealing the truth while asserting a falsehood created an internal conflict that activated the sympathetic nervous system, producing cardiovascular changes. He chose to measure only systolic blood pressure because he found that diastolic pressure was less readily controlled and more susceptible to fluctuations from external conditions [9]Verified The Lasso of Truth and the Lie Detector
Confirms Marston's 1917 publication in Journal of Experimental Psychology; choice of systolic over diastolic BP; Larson's 1921 polygraph; Keeler's 1926 refinement. For more on the science behind these physiological measurements, see our guide on what a polygraph machine looks for in a liar.

From Observation to Diagnostic Test

This was not a wholly original observation. Hans Gross, the Austrian criminologist, had noted the potential forensic value of physiological measurements decades earlier. Angelo Mosso and Domenico Mosso had used plethysmographic measurements to record blood volume changes associated with emotional states. But Marston's innovation was to develop a structured testing procedure that used intermittent blood pressure readings taken during a standardized interrogation format, transforming a physiological observation into something approaching a diagnostic test [9]Verified The Lasso of Truth and the Lie Detector
Confirms Marston's 1917 publication in Journal of Experimental Psychology; choice of systolic over diastolic BP; Larson's 1921 polygraph; Keeler's 1926 refinement.

In 1917, Marston published his findings in the Journal of Experimental Psychology in a landmark article titled 'Systolic Blood Pressure Symptoms of Deception' [10]Verified Systolic blood pressure symptoms of deception
Confirms Marston's 1917 article in Journal of Experimental Psychology, Vol. 2, pp. 117-163. This paper described the experiments he had conducted and articulated the theoretical framework linking blood pressure changes to deceptive consciousness. The article became the foundation of the technique that would later be tested in the Frye courtroom. For a detailed examination of the test itself, see our complete scientific history of Marston's systolic blood pressure test.

The Instrument and Testing Procedure

The apparatus Marston used was strikingly simple compared to modern polygraph instruments. He employed a standard clinical sphygmomanometer — the same inflatable arm cuff and mercury column device that physicians used to measure blood pressure [9]Verified The Lasso of Truth and the Lie Detector
Confirms Marston's 1917 publication in Journal of Experimental Psychology; choice of systolic over diastolic BP; Larson's 1921 polygraph; Keeler's 1926 refinement. This was not an electronic instrument or a continuously recording device. It required manual inflation of the cuff, auscultation with a stethoscope to detect Korotkoff sounds, and visual reading of the mercury column.

This simplicity was both a strength and a limitation. On one hand, it meant that the technique required no specialized or expensive equipment — any physician or trained experimenter could administer the test. On the other hand, blood pressure readings were intermittent rather than continuous. Unlike the multi-channel polygraph instruments that would follow — beginning with John Larson's 1921 'cardio-pneumo-psychogram' [11]Verified A Brief History of the Lie Detector
Confirms Yerkes sponsored Marston's research under NRC; Marston's 100% claimed success rate on 20 Boston detainees; Larson's subsequent development — Marston's method captured blood pressure only at specific moments during the examination. For a broader perspective on the evolution from Marston's single-channel approach to modern instruments, explore our guide to the different types of lie detector machines.

The Four-Stage Protocol

Marston's testing procedure followed a structured four-stage protocol:

First, he established a baseline by taking multiple resting blood pressure readings to determine the subject's normal systolic pressure under non-deceptive conditions. This baseline was critical for interpreting subsequent readings.

Second, he administered known-truth questions. Subjects answered a series of questions truthfully while blood pressure was recorded during or immediately after these responses, establishing the physiological pattern associated with honesty.

Third, he introduced the deception condition. Subjects were instructed to lie about specific facts or were placed in scenarios where they had concealed information. Blood pressure readings were taken during deceptive responses and compared to the truthful baseline.

Fourth, he compared systolic blood pressure readings across truthful and deceptive conditions. Significant elevations in systolic pressure during deceptive responses were interpreted as indicators of deception.

The experimental paradigm typically involved 'mock crime' or 'card test' designs. In one common variant, a subject would select a card, conceal it, and then deny having selected it when questioned. In more elaborate scenarios, subjects might be asked to 'steal' an object and then deny the theft during questioning. The experimenter, who knew the ground truth, would then attempt to determine through blood pressure measurements whether the subject was lying.

Harvard Students and Laboratory Conditions

One of the most important questions in evaluating any experimental study is who served as subjects. Marston's subject pool consisted primarily of Harvard University students, faculty, and associates — a group that was overwhelmingly male, educated, young, and drawn from relatively privileged socioeconomic backgrounds.

The exact number of subjects across all of Marston's Harvard experiments is difficult to determine precisely, as his publications and later testimony provide varying accounts. According to his own claims, he and his colleagues tested a total of 100 criminal cases in Boston Municipal Court [12]Verified The Invention of Lie Detection: Dr. William Marston
Confirms Marston tested 100 criminal cases in Boston court with 97 correct determinations; Frye case details and appeal, in addition to extensive laboratory testing with Harvard student volunteers.

Several characteristics of this subject pool are notable. The laboratory subjects knew they were participating in an experiment — even when asked to commit a 'mock crime,' they understood there would be no real consequences for deception. This fundamentally altered the emotional dynamics of the testing situation. Modern research on deception detection experiments has explored how observer decisions and experimental paradigms affect accuracy, as documented in studies on probability models of accuracy in deception detection experiments [13]Verified A probability model of accuracy in deception detection experiments
Foundational research relevant to evaluating accuracy claims in deception detection experiments.

Wartime Expansion of the Subject Pool

During the war years, Marston had access to a somewhat broader subject pool, including military personnel and detainees in the Boston Municipal Court. In one notable test on 20 detainees at the Boston Municipal Court, Marston claimed a 100 percent success rate in lie detection [14]Verified Beyond the Polygraph: Deception Detection and the Autonomic Nervous System
Confirms Marston invented systolic BP deception test in 1915; Lombroso's 1881 blood pressure glove; context of autonomic nervous system research. These subjects brought different characteristics — different stress levels, different motivations — but they were tested under conditions that introduced their own confounding variables.

Research has consistently shown that the emotional, cognitive, and physiological responses to questioning are heavily influenced by context, stakes, and individual differences. Contemporary studies on patterns of nonverbal behavior associated with truth and deception demonstrate that deceptive and truthful participants exhibit significantly different temporal patterns across experiments [15]Verified Patterns of nonverbal behavior associated with truth and deception
Demonstrates that deceptive and truthful participants exhibit significantly different temporal patterns across experiments, validating the core insight behind Marston's work while highlighting its complexity.

Marston's Reported Results

Marston's published reports and later testimony claimed remarkably high accuracy rates for his systolic blood pressure deception test. According to a detailed analysis in the Yale Law Journal, Marston — who did not conduct the interrogations himself but merely read graphs recording blood pressure readings — was right thirty-four out of thirty-five times, achieving an accuracy rate of 97.1% [7]Verified Proving Frye as a Matter of Law, Science, and History
Confirms Marston's dissertation began under Münsterberg and Langfeld in 1913; accuracy rate of 97.1% (34/35 correct); Committee on Tests for Deception. He also claimed that in testing 100 criminal cases in Boston criminal court, his systolic blood pressure test led to correct determinations in 97 of them [12]Verified The Invention of Lie Detection: Dr. William Marston
Confirms Marston tested 100 criminal cases in Boston court with 97 correct determinations; Frye case details and appeal.

These numbers were central to his reputation and to his attempt to introduce the technique as evidence in court. Marston's definition of 'accuracy' was based on his ability to correctly classify responses as truthful or deceptive when compared to known ground truth. In his laboratory experiments, the ground truth was established by the experimental design itself — the experimenter knew which card the subject had selected, which object had been concealed.

Marston reported that systolic blood pressure reliably rose during deceptive responses compared to truthful ones. The magnitude of these increases varied across subjects and conditions, but Marston argued that the pattern was consistent enough to form the basis of a reliable diagnostic test.

Evaluating the Accuracy Claims

While Marston's accuracy claims were impressive, several factors likely contributed to the apparently high rates. Small sample sizes meant that statistical noise could produce misleadingly high accuracy rates that might not replicate in larger studies. Experimenter expectancy effects were present because Marston knew the ground truth during testing, creating the possibility that his expectations influenced his readings. The controlled laboratory environment minimized variables that could complicate interpretation in real-world settings.

Notably, John F. Shepard, who chaired the National Research Council subcommittee evaluating Marston's work, expressed strong skepticism. Shepard wrote that 'the same results would be caused by so many different circumstances, anything demanding equal activity (intellectual or emotional), that it would be practically impossible to divide any individual case' [8]Verified Harvard's Real 'Lasso of Truth'
Confirms Elizabeth Holloway Marston's blood pressure insight; Shepard subcommittee evaluation; wartime testing claims. This critique anticipates modern understanding that physiological arousal during questioning can result from many factors beyond deception.

Research such as Timothy Levine's work on transparent liars explaining 54% accuracy in deception detection experiments has since shown that a few highly transparent liars can inflate overall accuracy statistics in ways that don't generalize [16]Verified A Few Transparent Liars Explaining 54% Accuracy in Deception Detection Experiments
Foundational research on how a few transparent liars can inflate overall accuracy statistics in deception detection. Despite these limitations, Marston's basic observation was correct — systolic blood pressure does tend to rise during deception in many individuals under many conditions. This finding has been confirmed by over a century of subsequent research.

Military Interest and Wartime Testing

After the United States entered World War I, Marston attempted to interest the Committee on Psychology at the National Research Council in his work and its potential to detect espionage [17]Verified Appendix E: Historical Notes on the Modern Polygraph
Confirms Committee on Psychology at NRC chaired by Yerkes; Shepard subcommittee; Marston's collaboration with Burtt and Troland; wartime testing; Marston as foundational figure. The committee was chaired by Robert M. Yerkes, the prominent Harvard-trained psychologist who had written on the uses of psychological methods for the detection of crime [17]Verified Appendix E: Historical Notes on the Modern Polygraph
Confirms Committee on Psychology at NRC chaired by Yerkes; Shepard subcommittee; Marston's collaboration with Burtt and Troland; wartime testing; Marston as foundational figure.

According to the National Academies Press, Marston submitted a proposal to Yerkes on October 9, 1917, for the next phase of his deception detection research. On October 13, the committee voted to set up a subcommittee under the chairmanship of John F. Shepard to consider 'the value of methods of testing for deception' and to evaluate Marston's proposal [17]Verified Appendix E: Historical Notes on the Modern Polygraph
Confirms Committee on Psychology at NRC chaired by Yerkes; Shepard subcommittee; Marston's collaboration with Burtt and Troland; wartime testing; Marston as foundational figure. This subcommittee was subsequently referred to as the Committee on Tests for Deception [7]Verified Proving Frye as a Matter of Law, Science, and History
Confirms Marston's dissertation began under Münsterberg and Langfeld in 1913; accuracy rate of 97.1% (34/35 correct); Committee on Tests for Deception.

Two weeks later, following the set-up of apparatus in the Harvard Laboratory, Marston wired Yerkes with the message claiming 'remarkable results' from 'thirty deception tests under iron clad precautions' [17]Verified Appendix E: Historical Notes on the Modern Polygraph
Confirms Committee on Psychology at NRC chaired by Yerkes; Shepard subcommittee; Marston's collaboration with Burtt and Troland; wartime testing; Marston as foundational figure. This was followed by a letter detailing work Marston had carried out with Harold E. Burtt and Leonard T. Troland, and the subsequent testing of 20 cases in Boston Municipal Court [17]Verified Appendix E: Historical Notes on the Modern Polygraph
Confirms Committee on Psychology at NRC chaired by Yerkes; Shepard subcommittee; Marston's collaboration with Burtt and Troland; wartime testing; Marston as foundational figure.

Shepard's Skeptical Evaluation

Shepard reported back to the committee on December 14 on Marston's work, and the committee decided to pursue the approach further [17]Verified Appendix E: Historical Notes on the Modern Polygraph
Confirms Committee on Psychology at NRC chaired by Yerkes; Shepard subcommittee; Marston's collaboration with Burtt and Troland; wartime testing; Marston as foundational figure. However, Shepard's written report was not so positive — he expressed strong skepticism about the use of blood pressure tests, identifying flaws in Marston's methodology [17]Verified Appendix E: Historical Notes on the Modern Polygraph
Confirms Committee on Psychology at NRC chaired by Yerkes; Shepard subcommittee; Marston's collaboration with Burtt and Troland; wartime testing; Marston as foundational figure.

Harold E. Burtt, who collaborated with Marston during this period, went on to become Professor of Psychology and Chairman of the Department of Psychology at Ohio State University [18]Verified Harold E. Burtt
Confirms Harold Ernest Burtt as Professor of Psychology and Chairman, Department of Psychology, Ohio State University. He served on a National Research Council board with Marston [19]Verified Harold E. Burtt — NRC Board with Marston
Confirms Burtt served in U.S. Army Air Service during WWI in 1918; served on a National Research Council board with William Marston, and his parallel work contributed to the broader research effort on deception detection during the war years.

Marston himself claimed that he administered systolic blood pressure tests on spies during this period, though no details of these tests are available [17]Verified Appendix E: Historical Notes on the Modern Polygraph
Confirms Committee on Psychology at NRC chaired by Yerkes; Shepard subcommittee; Marston's collaboration with Burtt and Troland; wartime testing; Marston as foundational figure. The wartime work gave Marston's research visibility and urgency that pure laboratory science would not have provided, even as skeptics within the NRC questioned whether the technique was ready for real-world application. For more on how polygraph testing evolved during this era, see Polygraph in the 1920s: From University Labs to Police Stations.

Completing the PhD

Marston completed his doctoral research at Harvard and received his PhD in Psychology in 1921 [1]Verified William Moulton Marston
Confirms Marston born May 9, 1893 in Cliftondale, Saugus, Massachusetts; Harvard degrees (B.A. 1915, LL.B. 1918, PhD 1921); creation of systolic blood pressure test and Wonder Woman. His dissertation was titled 'Systolic Blood Pressure Symptoms of Deception and Constituent Mental States,' as confirmed by Harvard University Archives [20]Verified Papers of William Moulton Marston, 1899-2002
Confirms dissertation title 'Systolic Blood Pressure Symptoms of Deception and Constituent Mental States'; born 1893 in Saugus, MA. The dissertation synthesized years of experimental work and articulated both the theoretical framework and empirical evidence for his deception test.

Marston's academic career at Harvard was remarkably productive. He earned his B.A. in 1915, his LL.B. (law degree) in 1918, and his PhD in Psychology in 1921 — all from Harvard [1]Verified William Moulton Marston
Confirms Marston born May 9, 1893 in Cliftondale, Saugus, Massachusetts; Harvard degrees (B.A. 1915, LL.B. 1918, PhD 1921); creation of systolic blood pressure test and Wonder Woman. During this period, he served as a Second Lieutenant assigned to the United States Army School of Military Psychology during World War I [1]Verified William Moulton Marston
Confirms Marston born May 9, 1893 in Cliftondale, Saugus, Massachusetts; Harvard degrees (B.A. 1915, LL.B. 1918, PhD 1921); creation of systolic blood pressure test and Wonder Woman.

His 1917 article in the Journal of Experimental Psychology — titled 'Systolic Blood Pressure Symptoms of Deception' — had already established his public reputation as an innovator in deception detection [10]Verified Systolic blood pressure symptoms of deception
Confirms Marston's 1917 article in Journal of Experimental Psychology, Vol. 2, pp. 117-163. A follow-up article, 'Reaction-Time Symptoms of Deception,' appeared in the same journal in 1920 [21]Verified Reaction-time symptoms of deception
Confirms Marston's 1920 follow-up paper; references Münsterberg's experiments and the 1917 blood pressure article. By the time he completed his PhD, Marston had established himself as the leading American researcher on physiological deception detection.

From Harvard to American University

After completing his doctorate, Marston pursued an academic career. He taught at American University in Washington, D.C., where he also leveraged his law degree [22]Verified Frye's Backstory: A Tale of Murder, a Retracted Confession, and Scientific Hubris
Confirms Frye case details; Van Orsdel's opinion; Marston discovering test in 1915; testing Frye in D.C. jail; December 1923 ruling. It was during this period that he became involved in the case that would define both his career and the legal history of scientific evidence.

Marston's academic reception was mixed. Within psychology, his work was recognized as a genuine contribution to the understanding of psychophysiological responses. The 2003 National Research Council report acknowledged that 'in many ways we can trace the idea of using psychophysiological recordings — in particular, systolic blood pressure — to measure deception in laboratory and legal settings to William Moulton Marston' [17]Verified Appendix E: Historical Notes on the Modern Polygraph
Confirms Committee on Psychology at NRC chaired by Yerkes; Shepard subcommittee; Marston's collaboration with Burtt and Troland; wartime testing; Marston as foundational figure. However, his self-promotional tendencies and the boldness of his accuracy claims generated skepticism among more cautious researchers. For more on the modern assessment of polygraph science, explore the Federal Psychophysiological Detection of Deception Examiner Handbook [23]Verified Federal Psychophysiological Detection of Deception Examiner Handbook
Official policy manual for all federal polygraph programs, standardizing procedures that evolved from Marston's foundational work.

The Frye Murder Case

The case that would make Marston's work famous — and establish the most important standard for scientific evidence in American legal history — began with a Saturday night shooting in Washington, D.C. On November 28, 1920, Dr. Robert W. Brown, president of the National Benefit Life Insurance Company, was fatally shot [22]Verified Frye's Backstory: A Tale of Murder, a Retracted Confession, and Scientific Hubris
Confirms Frye case details; Van Orsdel's opinion; Marston discovering test in 1915; testing Frye in D.C. jail; December 1923 ruling. Nearly a year later, James Alphonso Frye was arrested and confessed to the murder [22]Verified Frye's Backstory: A Tale of Murder, a Retracted Confession, and Scientific Hubris
Confirms Frye case details; Van Orsdel's opinion; Marston discovering test in 1915; testing Frye in D.C. jail; December 1923 ruling.

A few days later, Frye recanted his confession, claiming he had admitted to the crime because he had been promised a share of the reward for his own conviction [22]Verified Frye's Backstory: A Tale of Murder, a Retracted Confession, and Scientific Hubris
Confirms Frye case details; Van Orsdel's opinion; Marston discovering test in 1915; testing Frye in D.C. jail; December 1923 ruling. Marston, then a faculty member at American University, agreed to test Frye using his systolic blood pressure deception test. He administered the test in the D.C. jail and was surprised to find that Frye's claim of innocence appeared entirely truthful — his confession appeared to be a lie [22]Verified Frye's Backstory: A Tale of Murder, a Retracted Confession, and Scientific Hubris
Confirms Frye case details; Van Orsdel's opinion; Marston discovering test in 1915; testing Frye in D.C. jail; December 1923 ruling.

When Marston was introduced as an expert witness at trial, the presiding judge excluded the evidence. Frye was convicted of second-degree murder [22]Verified Frye's Backstory: A Tale of Murder, a Retracted Confession, and Scientific Hubris
Confirms Frye case details; Van Orsdel's opinion; Marston discovering test in 1915; testing Frye in D.C. jail; December 1923 ruling. To understand how polygraph evidence is treated in modern courts, see our guide on whether a private polygraph test can be used as evidence.

The Landmark Ruling of December 3, 1923

The case was appealed to the Court of Appeals of the District of Columbia, which issued its ruling on December 3, 1923 [24]Verified Frye v. United States, 293 F. 1013 (D.C. Cir. 1923)
Primary source confirming December 3, 1923 ruling; Van Orsdel as Associate Justice; 'general acceptance' standard language. The court's opinion was authored by Associate Justice Josiah Van Orsdel [24]Verified Frye v. United States, 293 F. 1013 (D.C. Cir. 1923)
Primary source confirming December 3, 1923 ruling; Van Orsdel as Associate Justice; 'general acceptance' standard language, and in what the Journal of the American Academy of Psychiatry and the Law describes as 'a maddeningly terse two-page opinion,' Van Orsdel articulated what became known as the 'general acceptance' standard [22]Verified Frye's Backstory: A Tale of Murder, a Retracted Confession, and Scientific Hubris
Confirms Frye case details; Van Orsdel's opinion; Marston discovering test in 1915; testing Frye in D.C. jail; December 1923 ruling.

The court's key passage stated that while courts will go far in admitting expert testimony deduced from well-organized scientific principles, 'the thing from which the deduction is made must be sufficiently established to have gained general acceptance in the particular field in which it belongs' [24]Verified Frye v. United States, 293 F. 1013 (D.C. Cir. 1923)
Primary source confirming December 3, 1923 ruling; Van Orsdel as Associate Justice; 'general acceptance' standard language. The court concluded that 'the systolic blood pressure deception test has not yet gained such standing and scientific recognition among physiological and psychological authorities as would justify the courts in admitting expert testimony' [24]Verified Frye v. United States, 293 F. 1013 (D.C. Cir. 1923)
Primary source confirming December 3, 1923 ruling; Van Orsdel as Associate Justice; 'general acceptance' standard language.

The Frye 'general acceptance' standard became the dominant rule governing the admissibility of scientific expert testimony in American courts for the next 70 years [25]Verified Frye Standard
Confirms Frye standard governed scientific evidence admissibility; largely replaced by Daubert standard but still law in some states, until it was superseded by the Daubert standard in 1993 [25]Verified Frye Standard
Confirms Frye standard governed scientific evidence admissibility; largely replaced by Daubert standard but still law in some states. Some states continue to follow the Frye standard today [25]Verified Frye Standard
Confirms Frye standard governed scientific evidence admissibility; largely replaced by Daubert standard but still law in some states. The Frye standard remains one of polygraph science's most significant legal legacies — learn more about its long-term impact through our coverage of the 1988 OTA Report.

The Foundation of Modern Polygraph Instruments

Despite the courtroom rejection in Frye, Marston's work established the fundamental concept that physiological measurements could detect deception — a concept that has driven polygraph science for over a century. His systolic blood pressure test became one component of the modern polygraph instruments that followed [1]Verified William Moulton Marston
Confirms Marston born May 9, 1893 in Cliftondale, Saugus, Massachusetts; Harvard degrees (B.A. 1915, LL.B. 1918, PhD 1921); creation of systolic blood pressure test and Wonder Woman.

John Augustus Larson, a Berkeley police officer with a PhD in physiology, read Marston's 1921 article 'Physiological Possibilities of the Deception Test' and built the first continuous, multi-channel polygraph in 1921, incorporating blood pressure, pulse, and respiration measurements [11]Verified A Brief History of the Lie Detector
Confirms Yerkes sponsored Marston's research under NRC; Marston's 100% claimed success rate on 20 Boston detainees; Larson's subsequent development. Leonarde Keeler later refined the design into a more compact and portable instrument in 1926 [9]Verified The Lasso of Truth and the Lie Detector
Confirms Marston's 1917 publication in Journal of Experimental Psychology; choice of systolic over diastolic BP; Larson's 1921 polygraph; Keeler's 1926 refinement. These developments — directly inspired by Marston's foundational work — transformed deception detection from a single-channel laboratory curiosity into the multi-channel polygraph profession that exists today. For the full story of these developments, explore our first uses of the polygraph.

Modern research continues to build on Marston's core insight. Contemporary studies using techniques such as P300 brain-wave analysis for the Concealed Information Test have demonstrated large effect sizes for detecting concealed knowledge [26]Verified Decoding Deception with the P300: A Meta-Analysis of the Concealed Information Test
Demonstrates modern deception detection techniques building on physiological measurement principles; large effect size (d=1.59) for P300-based CIT, while research into face temperature changes as indicators of deception explores new physiological channels beyond those Marston imagined [27]Verified Experiments in Using Face Temperature Changes as an Indicator in Instrumental Detection of Deception
Demonstrates continued innovation in physiological deception detection channels beyond Marston's blood pressure approach. The British Psychological Society's review of polygraph testing has assessed the accumulated evidence across multiple applications [28]Verified A Review of the Current Scientific Status and Fields of Application of Polygraphic Deception Detection
Official UK scientific assessment reviewing the evidence base across multiple polygraph applications.

Beyond the Polygraph: DISC Theory and Wonder Woman

Marston's contributions extended well beyond deception detection. His 1928 book Emotions of Normal People introduced the DISC behavioral model — categorizing human behavior along axes of Dominance, Inducement, Submission, and Compliance — which remains widely used in personality assessment and organizational psychology today. Learn more about this fascinating connection in our article on William Marston's DISC Theory: Polygraph to Personality.

Most famously, Marston created the comic book character Wonder Woman in 1941, writing under the pen name Charles Moulton [1]Verified William Moulton Marston
Confirms Marston born May 9, 1893 in Cliftondale, Saugus, Massachusetts; Harvard degrees (B.A. 1915, LL.B. 1918, PhD 1921); creation of systolic blood pressure test and Wonder Woman. Wonder Woman's Lasso of Truth — which compels those ensnared by it to speak the truth — was directly inspired by Marston's deception detection work [8]Verified Harvard's Real 'Lasso of Truth'
Confirms Elizabeth Holloway Marston's blood pressure insight; Shepard subcommittee evaluation; wartime testing claims. The character debuted in All Star Comics #8 in December 1941 and has been in print almost continuously ever since [1]Verified William Moulton Marston
Confirms Marston born May 9, 1893 in Cliftondale, Saugus, Massachusetts; Harvard degrees (B.A. 1915, LL.B. 1918, PhD 1921); creation of systolic blood pressure test and Wonder Woman.

Marston died of cancer on May 2, 1947, in Rye, New York, seven days before his 54th birthday [1]Verified William Moulton Marston
Confirms Marston born May 9, 1893 in Cliftondale, Saugus, Massachusetts; Harvard degrees (B.A. 1915, LL.B. 1918, PhD 1921); creation of systolic blood pressure test and Wonder Woman. His legacy endures in three distinct domains: the polygraph profession that traces its scientific lineage through his blood pressure experiments, the DISC personality assessment used by millions worldwide, and the iconic Wonder Woman, one of the most recognizable characters in popular culture.