Every profession needs a governing body, and the polygraph field is no different; this history recounts how the APA came to steward standards for the lie detector test.
The American Polygraph Association has shaped virtually every aspect of modern polygraph practice since its incorporation in 1966. This comprehensive guide traces the APA's origins from the merger of five predecessor organizations, its founding figures, landmark policy decisions, and its current role as the profession's primary standards body — covering nearly six decades of institutional history that every examiner and stakeholder should understand.
TL;DR — The Short Version
- Founded in 1966 — The APA was incorporated in Washington, D.C., resulting from the merger of five predecessor organizations: the Academy of Scientific Interrogation, the American Academy of Polygraph Sciences, the National Board of Polygraph Examiners, the International Association of Polygraph Examiners, and the International Association for Polygraph Research.
- Unified the profession — Before the APA, competing regional organizations created inconsistent standards, conflicting ethical codes, and confusion about who qualified as a legitimate polygraph examiner.
- Standards body — The APA established the first comprehensive standards of practice, code of ethics, and school accreditation requirements for the polygraph profession, requiring a minimum of 400 hours of training.
- Global reach — The APA expanded from an American-focused organization to represent more than 2,800 members from 58 countries, becoming the world's preeminent polygraph association.
- Research driven — The APA has published the peer-reviewed journal Polygraph since 1972, and its 2011 meta-analysis of 38 studies found a decision accuracy of 89% for event-specific diagnostic testing.
- Ongoing influence — The APA continues to shape federal and state polygraph policy, PCSOT standards, and the adoption of emerging credibility assessment technologies.
Who This Guide Is For
- Polygraph examiners seeking to understand the institutional history of their profession
- Individuals considering a career in polygraph who want to understand the governing structure
- Attorneys and legal professionals who encounter APA standards in court proceedings
- Students and researchers studying the history of forensic science and credibility assessment
- Government officials and policymakers who reference APA standards in legislation
- Anyone preparing for or curious about polygraph testing who wants to understand the standards behind it
The Polygraph Landscape Before the APA
A Profession Without Unified Governance
To understand why the American Polygraph Association was founded, you must first understand the fragmented state of the polygraph profession in the decades leading up to 1966. The lie detector had been in practical use since the early 1920s, when John Larson developed the first continuous polygraph instrument at the Berkeley Police Department under the mentorship of Chief August Vollmer [7]Verified A Review of the Polygraph: History, Methodology and Current Status
Comprehensive review of CQT and CIT methods, polygraph history from early instruments to modern practice. By the 1930s, Leonarde Keeler had moved to Chicago to work at the Scientific Crime Detection Laboratory (SCDL) headquartered at Northwestern University, where he headed the polygraph department [8]Verified Finding Aid to the Leonarde Keeler Papers, 1899-1972
Confirms Keeler moved to Chicago in 1930 to work at the Scientific Crime Detection Laboratory at Northwestern University, headed the polygraph department[9]Verified Scientific Crime Detection Laboratory — Chicagology
Confirms the SCDL was established in Fall 1929 at Northwestern University's Law School, with Leonarde Keeler heading the polygraph department. The SCDL, established in the fall of 1929, was America's first independent forensic crime laboratory [10]Verified Teaching Forensic Science to the American Police and Public: The SCDL, 1929-1938
Confirms the Scientific Crime Detection Laboratory was established in 1929 at Northwestern University as America's first independent forensic crime laboratory.
Fred E. Inbau joined Northwestern as a research assistant in the SCDL in 1933, becoming its director in 1938 when the laboratory was sold to the Chicago Police Department [11]Verified Fred E. Inbau Papers — Northwestern University Archives
Confirms Inbau came to Northwestern as a research assistant in the SCDL in 1933, became director in 1938, returned as law professor in 1945, and published 50+ journal articles and 18 books. Inbau later returned to Northwestern as a law professor in 1945, publishing over 50 journal articles and 18 books during his career [12]Verified Fred E. Inbau — Social Networks and Archival Context
Confirms Inbau published more than 50 journal articles and 18 books, founded Americans for Effective Law Enforcement in 1966, and had a long association with John E. Reid. His work alongside John E. Reid, whom he met when Reid joined the SCDL in 1940, produced foundational polygraph texts including Truth and Deception: The Polygraph Technique (1966) [11]Verified Fred E. Inbau Papers — Northwestern University Archives
Confirms Inbau came to Northwestern as a research assistant in the SCDL in 1933, became director in 1938, returned as law professor in 1945, and published 50+ journal articles and 18 books. Learn more about Inbau's legacy in our profile of Fred Inbau: Chicago's Forensic Science Pioneer.
The early polygraph pioneers built techniques inspired by foundational research in psychophysiology, including the word association experiments that Carl Jung developed and early pulse studies documented by Mackenzie. For a full timeline of polygraph development, see our History of the Lie Detector Test.
Competing Organizations and Fragmented Standards
By the late 1950s and early 1960s, the polygraph profession was served by multiple competing organizations, each with its own standards, ethics codes, and membership criteria. Among these were the Academy of Scientific Interrogation — where Cleve Backster served as Chairman of the Research and Instrument Committee [13]Verified Cleve Backster — Wikipedia
Confirms Backster was chairman of the Research and Instrument Committee of the Academy for Scientific Interrogation, and founded the CIA's polygraph unit — the American Academy of Polygraph Sciences, the National Board of Polygraph Examiners, the International Association of Polygraph Examiners, and the International Association for Polygraph Research [1]Verified APA Terminology Reference for the Science of Psychophysiological Detection of Deception (2022)
Confirms the APA was incorporated in 1966 in Washington, D.C., from merger of five organizations including the Academy of Scientific Interrogation, American Academy of Polygraph Sciences, National Board of Polygraph Examiners, International Association of Polygraph Examiners, and International Association for Polygraph Research.
This fragmentation meant that an examiner could hold credentials from one body that were not recognised by another. There was no uniform training standard, no single code of ethics, and no unified voice to represent the profession in legislative and judicial arenas. The lack of a single authoritative body also made it difficult to defend polygraph testing against growing criticism in the courts and Congress.
The 1966 Founding: A Merger of Five Organizations
Incorporation in Washington, D.C.
The American Polygraph Association was incorporated in 1966 in Washington, D.C. [1]Verified APA Terminology Reference for the Science of Psychophysiological Detection of Deception (2022)
Confirms the APA was incorporated in 1966 in Washington, D.C., from merger of five organizations including the Academy of Scientific Interrogation, American Academy of Polygraph Sciences, National Board of Polygraph Examiners, International Association of Polygraph Examiners, and International Association for Polygraph Research[14]Verified American Polygraph Association — Wikipedia
Confirms APA established 1966, approximately 2,800 members, Chris Gugas demonstrated polygraph on Groucho Marx's show, and that the APA does not certify individuals. It resulted from the merger of five predecessor polygraph associations: the Academy of Scientific Interrogation, the American Academy of Polygraph Sciences, the National Board of Polygraph Examiners, the International Association of Polygraph Examiners, and the International Association for Polygraph Research [1]Verified APA Terminology Reference for the Science of Psychophysiological Detection of Deception (2022)
Confirms the APA was incorporated in 1966 in Washington, D.C., from merger of five organizations including the Academy of Scientific Interrogation, American Academy of Polygraph Sciences, National Board of Polygraph Examiners, International Association of Polygraph Examiners, and International Association for Polygraph Research. This merger was a watershed moment for the profession, bringing together practitioners from law enforcement, government, and the private sector under one professional umbrella.
The APA's founding charter established its core purposes: encouraging and supporting research, training and education; establishing and enforcing standards of ethical practice; and providing a forum for the exchange of professional knowledge [14]Verified American Polygraph Association — Wikipedia
Confirms APA established 1966, approximately 2,800 members, Chris Gugas demonstrated polygraph on Groucho Marx's show, and that the APA does not certify individuals. From the beginning, the APA positioned itself not merely as a trade association but as a standards-setting body dedicated to evidence-based practice [3]Verified About the APA — American Polygraph Association Official Website
Confirms APA represents more than 2,800 examiners, is governed by 11 elected officers, headquartered in Chattanooga, Tennessee, and that accredited schools teach fundamental techniques achieving accuracy rates exceeding 90%.
Why Unification Mattered
The merger addressed several critical problems. First, it created a single set of professional standards that examiners nationwide could follow. Second, it established a unified voice for lobbying at the federal and state level — essential as Congress increasingly scrutinised polygraph use. Third, it enabled the profession to speak with one voice in the courts, where polygraph admissibility was (and remains) frequently contested.
The APA's founding also set the stage for the development of standardised testing techniques. Around the same time, Cleve Backster was developing the Zone Comparison Technique — the first polygraph interpretation system to incorporate numerical analysis [15]Verified Cleve Backster — Psi Encyclopedia
Confirms the Backster Zone Comparison Technique was the first polygraph interpretation system to use numerical evaluation[16]Verified Zone Comparison Technique (ZCT) — Backster's 1963 Standardized Notepack
Confirms Backster published his Standardized Polygraph Notepack and Technique Guide for the Zone Comparison Technique in 1963. Backster, who had founded the CIA's polygraph program in 1949 [17]Verified Cleve Backster Papers — University of West Georgia Special Collections
Confirms Backster instituted the CIA's polygraph examination program in 1949 and founded the Backster School of Lie Detection in 1951 and established the Backster School of Lie Detection, was instrumental in advancing the scientific rigor of polygraph methodology.
Key Founding Figures and Early Leaders
Chris Gugas: Founding Member and Past President
Chris Gugas (1921–2007) was a founding member and past president of the APA [18]Verified Chris Gugas, Sr., R.I.P. — Obituary and APA Magazine Memorial
Confirms Chris Gugas was a founding member and past president of the APA, administered 40,000+ polygraph examinations, and polygraphed James Earl Ray. A former CIA intelligence officer, Gugas administered more than 40,000 polygraph examinations during his career [18]Verified Chris Gugas, Sr., R.I.P. — Obituary and APA Magazine Memorial
Confirms Chris Gugas was a founding member and past president of the APA, administered 40,000+ polygraph examinations, and polygraphed James Earl Ray[19]Verified Chris Gugas Sr.; Administered Over 40,000 Lie-Detector Tests — Washington Post
Confirms Gugas founded three polygraph organisations, administered over 40,000 tests, and demonstrated polygraph on Groucho Marx's show in the 1950s. His most prominent examination was that of James Earl Ray, the man convicted of assassinating Dr. Martin Luther King, Jr. — Gugas judged Ray deceptive [18]Verified Chris Gugas, Sr., R.I.P. — Obituary and APA Magazine Memorial
Confirms Chris Gugas was a founding member and past president of the APA, administered 40,000+ polygraph examinations, and polygraphed James Earl Ray.
About ten years before the APA's founding, Gugas demonstrated the polygraph before a national television audience with Groucho Marx on the comedian's show You Bet Your Life [14]Verified American Polygraph Association — Wikipedia
Confirms APA established 1966, approximately 2,800 members, Chris Gugas demonstrated polygraph on Groucho Marx's show, and that the APA does not certify individuals[20]Verified Chris Gugas — Groucho Marx You Bet Your Life
Confirms Chris Gugas demonstrated the polygraph on Groucho Marx's You Bet Your Life about 10 years before the APA's founding. He later founded the National Polygraph Association in 1989 [21]Verified Chris Gugas and the National Polygraph Association
Confirms Dr. Chris Gugas founded the National Polygraph Association in March 1989 and authored The Silent Witness: A Polygraphist's Casebook (1979). Gugas's career exemplified the kind of high-profile, media-savvy advocacy that helped bring polygraph testing into the mainstream consciousness.
Cleve Backster: Polygraph Pioneer and CIA Innovator
Cleve Backster (1924–2013) was one of the most influential figures in the history of polygraphy [15]Verified Cleve Backster — Psi Encyclopedia
Confirms the Backster Zone Comparison Technique was the first polygraph interpretation system to use numerical evaluation[16]Verified Zone Comparison Technique (ZCT) — Backster's 1963 Standardized Notepack
Confirms Backster published his Standardized Polygraph Notepack and Technique Guide for the Zone Comparison Technique in 1963. After serving in the U.S. Navy and Army Counter Intelligence Corps, he joined the CIA in 1948 and instituted the agency's polygraph examination program in 1949 [17]Verified Cleve Backster Papers — University of West Georgia Special Collections
Confirms Backster instituted the CIA's polygraph examination program in 1949 and founded the Backster School of Lie Detection in 1951. He founded the Backster School of Lie Detection in 1951 [17]Verified Cleve Backster Papers — University of West Georgia Special Collections
Confirms Backster instituted the CIA's polygraph examination program in 1949 and founded the Backster School of Lie Detection in 1951 and developed the Backster Zone Comparison Technique circa 1960–1963, introducing the first numerical scoring system for polygraph chart interpretation [15]Verified Cleve Backster — Psi Encyclopedia
Confirms the Backster Zone Comparison Technique was the first polygraph interpretation system to use numerical evaluation[16]Verified Zone Comparison Technique (ZCT) — Backster's 1963 Standardized Notepack
Confirms Backster published his Standardized Polygraph Notepack and Technique Guide for the Zone Comparison Technique in 1963.
Backster's ZCT remains one of the most widely used polygraph methods in the world today. His published technique guide from 1963 became a foundational training document [22]Verified Backster Techniques and the APA Standards of Practice
Confirms the 1963 publication date for Backster's standardised zone comparison technique guide. While Backster also became known for his controversial primary perception experiments with plants, his contributions to polygraph methodology are regarded as transformative by the professional community.
Fred E. Inbau and the Northwestern Connection
Fred E. Inbau (1909–1998) was a towering figure in forensic science and polygraph research. His 37-year association with Northwestern University began in 1933 when he joined the Scientific Crime Detection Laboratory [11]Verified Fred E. Inbau Papers — Northwestern University Archives
Confirms Inbau came to Northwestern as a research assistant in the SCDL in 1933, became director in 1938, returned as law professor in 1945, and published 50+ journal articles and 18 books. Inbau's prolific scholarship — including over 50 journal articles and 18 books — helped establish the intellectual foundations of modern polygraphy [12]Verified Fred E. Inbau — Social Networks and Archival Context
Confirms Inbau published more than 50 journal articles and 18 books, founded Americans for Effective Law Enforcement in 1966, and had a long association with John E. Reid.
Inbau co-authored with John E. Reid the seminal text Lie Detection and Criminal Interrogation, and their partnership produced innovations in polygraph technique that influenced generations of examiners. In 1966, the same year the APA was founded, Inbau established Americans for Effective Law Enforcement [11]Verified Fred E. Inbau Papers — Northwestern University Archives
Confirms Inbau came to Northwestern as a research assistant in the SCDL in 1933, became director in 1938, returned as law professor in 1945, and published 50+ journal articles and 18 books, reflecting his broader commitment to professionalising law enforcement practices.
Richard O. Arther and the Journal of Polygraph Science
Richard O. Arther was a prominent polygraph examiner and educator who published extensively in the Journal of Polygraph Science, a separate publication from the APA's journal Polygraph [23]Verified DoDPI Library Holdings — Journal of Polygraph Science Citations
Confirms Richard O. Arther published in the Journal of Polygraph Science, with citations spanning from the 1980s through the 1990s. DoDPI library records confirm multiple citations from Arther in the Journal of Polygraph Science spanning from the 1980s through the late 1990s, on topics ranging from question formulation to accuracy measurement [23]Verified DoDPI Library Holdings — Journal of Polygraph Science Citations
Confirms Richard O. Arther published in the Journal of Polygraph Science, with citations spanning from the 1980s through the 1990s[24]Verified Norman Ansley Question Formulation — Journal of Polygraph Science References
Confirms multiple Arther publications in the Journal of Polygraph Science including volumes from 1982 and 1987. Arther's scholarly contributions helped build the academic literature that supported polygraph testing's credibility.
Standards, Ethics, and Training Accreditation
The APA's Standards of Practice
One of the APA's most significant contributions has been establishing comprehensive standards of practice for the polygraph profession. The APA establishes standards of ethical practices, techniques, instrumentation and research, as well as provides advanced training and continuing education programs [3]Verified About the APA — American Polygraph Association Official Website
Confirms APA represents more than 2,800 examiners, is governed by 11 elected officers, headquartered in Chattanooga, Tennessee, and that accredited schools teach fundamental techniques achieving accuracy rates exceeding 90%. Members are governed by a Code of Ethics and a set of Standards and Principles of Practice [3]Verified About the APA — American Polygraph Association Official Website
Confirms APA represents more than 2,800 examiners, is governed by 11 elected officers, headquartered in Chattanooga, Tennessee, and that accredited schools teach fundamental techniques achieving accuracy rates exceeding 90%.
These standards have evolved continuously over the decades. In 2011, the APA Board of Directors approved formal Research Standards for APA Publications [25]Verified APA Research Standards for Publications
Confirms research standards approved by APA Board of Directors on March 11, 2011, which set rigorous criteria for validity research, including requirements for statistical power analysis, interrater reliability calculations, and transparent reporting of study limitations. This commitment to methodological rigor helps ensure that polygraph practice remains grounded in the best available science. For details on APA examination protocols, see our guide to APA Standards on Polygraph Exam Time Limits.
The 400-Hour Training Requirement
APA-accredited polygraph training programs must provide a minimum of 400 hours of in-residence instruction [2]Verified PEAK Basic Polygraph Examiner's Course
Confirms APA-accredited basic polygraph course consists of a minimum of 400 hours[26]Verified APA-Accredited Polygraph Training — CIA Agent Education
Confirms APA-accredited programs require a minimum of 400 hours of in-residence study completed in 10 to 17 weeks with 95% faculty instruction. This intensive curriculum must be completed in 10 to 17 weeks, with at least 95 percent of instruction delivered by recognised faculty [26]Verified APA-Accredited Polygraph Training — CIA Agent Education
Confirms APA-accredited programs require a minimum of 400 hours of in-residence study completed in 10 to 17 weeks with 95% faculty instruction. Coursework covers the history of detection of deception, physiology, psychology, test question formulation, validated polygraph techniques, chart analysis, scoring systems, ethics, and supervised practical examinations.
As of recent count, the American International Institute of Polygraph (AIIP) is one of only eleven APA-accredited training institutions in the United States teaching this 400-hour Basic Polygraph Examiner Course [27]Verified American International Institute of Polygraph
Confirms AIIP is one of only eleven APA-accredited institutions in the U.S. teaching the 400-hour Basic Polygraph Examiner Course. PEAK Credibility Assessment Training Center, a subsidiary of Lafayette Instrument Company opened in 2016, is another APA-accredited provider [28]Verified PEAK Credibility Assessment Training Center — About
Confirms PEAK is APA-accredited and is a subsidiary of Lafayette Instrument Company, opened in 2016. These schools undergo regular inspection to ensure curricula meet the highest standards [3]Verified About the APA — American Polygraph Association Official Website
Confirms APA represents more than 2,800 examiners, is governed by 11 elected officers, headquartered in Chattanooga, Tennessee, and that accredited schools teach fundamental techniques achieving accuracy rates exceeding 90%.
Continuing Education Requirements
Practicing APA members must complete a minimum of 30 continuing education hours every two years in coursework related to the field of polygraphy [29]Verified APA Policy for Continuing Education Hours
Confirms practicing examiners must complete a minimum of 30 continuing education hours every two years. A practicing examiner is defined as any member who has conducted polygraph training, quality assurance, or examinations in the previous two years [29]Verified APA Policy for Continuing Education Hours
Confirms practicing examiners must complete a minimum of 30 continuing education hours every two years. This requirement ensures that examiners remain current with evolving techniques, technologies, and ethical standards.
The APA satisfies this need through its annual seminars, regional workshops, and published educational materials. The organisation's longstanding annual seminar series has run for over five decades, providing examiners with opportunities to learn about the latest research and network with peers. Those interested in the profession can learn more about how polygraph services work.
Research, Science, and the Journal Polygraph
Publication History Since 1972
The APA has published the peer-reviewed journal Polygraph since 1972 [5]Verified APA Polygraph Journals 1972-2008 Archive
Confirms the journal Polygraph has been published since 1972 with archived issues available. Volume 1 appeared in September 1972, and archived issues spanning 1972–2008 are available through the APA's website [5]Verified APA Polygraph Journals 1972-2008 Archive
Confirms the journal Polygraph has been published since 1972 with archived issues available. Past APA editor Don Krapohl and NCCA librarian Katie Baldwin compiled a comprehensive searchable database of journal articles from 1972–2018 [30]Verified Citations from Journal Polygraph 1972-2018
Confirms comprehensive searchable database of Polygraph journal articles from 1972-2018 compiled by Don Krapohl and Katie Baldwin. The journal instituted expert peer review in 2003, though earlier articles underwent editorial review [6]Verified Meta-Analytic Survey of Criterion Accuracy of Validated Polygraph Techniques
Confirms the 2011 meta-analysis found 87% accuracy across 38 studies with 11,737 scored results, and 89% for event-specific diagnostic testing.
The journal has served as the primary academic outlet for polygraph research, publishing field studies, analog studies, technique validation research, and historical analyses. It remains an essential resource for examiners, researchers, and policymakers seeking evidence-based information about polygraph practice. For a comprehensive overview of the field's scientific evolution, see the review by Synnott, Dietzel, and Ioannou (2015) [7]Verified A Review of the Polygraph: History, Methodology and Current Status
Comprehensive review of CQT and CIT methods, polygraph history from early instruments to modern practice.
The 2011 Meta-Analysis: 87% Accuracy Across Validated Techniques
In late 2011, the APA completed an exhaustive meta-analytic review of all peer-reviewed publications on polygraph testing that represented field practices and met APA Standards of Practice [6]Verified Meta-Analytic Survey of Criterion Accuracy of Validated Polygraph Techniques
Confirms the 2011 meta-analysis found 87% accuracy across 38 studies with 11,737 scored results, and 89% for event-specific diagnostic testing. The analysis included 38 studies involving 32 different samples and 45 experiments, encompassing 11,737 scored results from 3,723 examinations [6]Verified Meta-Analytic Survey of Criterion Accuracy of Validated Polygraph Techniques
Confirms the 2011 meta-analysis found 87% accuracy across 38 studies with 11,737 scored results, and 89% for event-specific diagnostic testing.
The results demonstrated that techniques intended for event-specific (single issue) diagnostic testing produced an aggregated decision accuracy of 89% [6]Verified Meta-Analytic Survey of Criterion Accuracy of Validated Polygraph Techniques
Confirms the 2011 meta-analysis found 87% accuracy across 38 studies with 11,737 scored results, and 89% for event-specific diagnostic testing. Multi-issue testing produced 85% accuracy [6]Verified Meta-Analytic Survey of Criterion Accuracy of Validated Polygraph Techniques
Confirms the 2011 meta-analysis found 87% accuracy across 38 studies with 11,737 scored results, and 89% for event-specific diagnostic testing. The combination of all validated PDD techniques, excluding outlier results, produced a decision accuracy of 87% with a 13% inconclusive rate [6]Verified Meta-Analytic Survey of Criterion Accuracy of Validated Polygraph Techniques
Confirms the 2011 meta-analysis found 87% accuracy across 38 studies with 11,737 scored results, and 89% for event-specific diagnostic testing. These findings were consistent with the National Research Council's 2003 conclusions and provide strong support for the validity of polygraph testing when conducted in accordance with APA Standards of Practice [6]Verified Meta-Analytic Survey of Criterion Accuracy of Validated Polygraph Techniques
Confirms the 2011 meta-analysis found 87% accuracy across 38 studies with 11,737 scored results, and 89% for event-specific diagnostic testing. For a deeper exploration of the evidence, see our guide to Polygraph Accuracy: What 80+ Years of Research Shows.
Legislative Battles and Government Relations
The 1983 OTA Report
In November 1983, the Office of Technology Assessment (OTA) published its technical memorandum, Scientific Validity of Polygraph Testing: A Research Review and Evaluation, at the request of the House Committee on Government Operations [31]Verified Scientific Validity of Polygraph Testing: A Research Review and Evaluation — OTA Technical Memorandum
Confirms the November 1983 OTA technical memorandum reviewing scientific evidence on polygraph validity for the House Committee on Government Operations[32]Verified Scientific Validity of Polygraph Testing — OTA Summary and Conclusions
Confirms OTA concluded no overall measure of polygraph validity could be established, but acknowledged the control question technique had some validity in criminal investigations. The OTA concluded that no overall measure or single judgment of polygraph validity could be established based on available scientific evidence, though it found the control question technique had some validity in criminal investigations [32]Verified Scientific Validity of Polygraph Testing — OTA Summary and Conclusions
Confirms OTA concluded no overall measure of polygraph validity could be established, but acknowledged the control question technique had some validity in criminal investigations.
A subsequent reanalysis of the OTA data by McCauley and Forman (1988) challenged some of the report's conclusions, finding that field studies, analog studies, and guilty knowledge studies produced average accuracy rates of 82% to 88% [33]Verified A Review of the OTA Report on Polygraph Validity
Reanalysis of OTA data finding field studies, analog studies, and guilty knowledge studies produced average accuracy of 82% to 88%. This reanalysis suggested the OTA's original statistical approach may have underestimated polygraph accuracy.
The Employee Polygraph Protection Act of 1988
The most transformative piece of legislation affecting the polygraph profession was the Employee Polygraph Protection Act of 1988 (EPPA), which became law on December 27, 1988 [34]Verified Employee Polygraph Protection Act of 1988 — 29 CFR § 801.1
Confirms EPPA became effective December 27, 1988, prohibiting most private employers from using lie detector tests[35]Verified Employee Polygraph Protection Act — Wikipedia
Confirms EPPA is a 1988 federal law preventing most private employers from using polygraph tests, with exemptions for security firms and government agencies. EPPA prohibits most private employers from using lie detector tests for pre-employment screening or during the course of employment [35]Verified Employee Polygraph Protection Act — Wikipedia
Confirms EPPA is a 1988 federal law preventing most private employers from using polygraph tests, with exemptions for security firms and government agencies. However, the act permits polygraph testing for certain security firms (armored car, alarm, and guard companies) and pharmaceutical manufacturers, distributors, and dispensers [35]Verified Employee Polygraph Protection Act — Wikipedia
Confirms EPPA is a 1988 federal law preventing most private employers from using polygraph tests, with exemptions for security firms and government agencies. Federal, state, and local government agencies are exempt from EPPA [35]Verified Employee Polygraph Protection Act — Wikipedia
Confirms EPPA is a 1988 federal law preventing most private employers from using polygraph tests, with exemptions for security firms and government agencies.
During the legislative debate, the APA advocated for establishing strict standards for the training and testing of polygraph examiners as an alternative approach to an outright ban [36]Verified Employee Polygraph Protection Act of 1988: Background and Implications
Confirms the APA advocated for strict standards for training and testing as an alternative approach to the EPPA ban, and EPPA eliminated 85% of existing tests. While EPPA significantly reduced private-sector polygraph use — eliminating an estimated 85% of the tests then being administered [36]Verified Employee Polygraph Protection Act of 1988: Background and Implications
Confirms the APA advocated for strict standards for training and testing as an alternative approach to the EPPA ban, and EPPA eliminated 85% of existing tests — it also inadvertently elevated professional standards by focusing remaining practice within more regulated contexts.
State Licensing and Regulation
The State Licensing Landscape
According to a survey by the American Polygraph Association, approximately 25 states have specific licensing requirements for polygraph examiners [37]Verified State Regulations and Their Influence on Polygraph Licensing
Confirms approximately 25 states have specific licensing requirements for polygraph examiners per APA survey. Requirements vary significantly from state to state — some states mandate completion of a 400-hour training program at an accredited school and passage of a state licensing examination, while others have no licensing requirements at all [37]Verified State Regulations and Their Influence on Polygraph Licensing
Confirms approximately 25 states have specific licensing requirements for polygraph examiners per APA survey.
The APA maintains a comprehensive directory of state licensing boards and associations on its website, listing contact information and basic requirements for each jurisdiction [38]Verified State Licensing Boards & Associations — APA Directory
Comprehensive APA directory of state licensing boards and associations with contact information for each jurisdiction. States like Alabama, Texas, and Virginia have among the most stringent requirements, while states including Kansas, Maryland, New Jersey, and Ohio have no license requirement [38]Verified State Licensing Boards & Associations — APA Directory
Comprehensive APA directory of state licensing boards and associations with contact information for each jurisdiction. For state-specific information, see our guides to polygraph testing in Florida, private testing in New Jersey, and testing in Pennsylvania.
APA Standards as a Legislative Benchmark
Even in states without formal licensing laws, APA standards frequently serve as the de facto benchmark for professional practice. Courts, employers, and government agencies routinely reference APA guidelines when evaluating examiner qualifications and test procedures. The APA's standards of practice, continuing education requirements, and school accreditation criteria provide a nationally recognised framework that transcends state boundaries.
The APA also plays a critical role in Post-Conviction Sex Offender Testing (PCSOT). An additional 40-hour trained to APA standards course is required for PCSOT certification [39]Verified Omega Polygraph — Professional Associations and PCSOT Certification
Confirms an additional 40-hour trained to APA standards course is required for PCSOT certification. Research consistently demonstrates the value of polygraph-assisted interviews in this area — studies show that polygraph groups disclose significantly more deviant sexual behaviors than comparison groups [40]Verified Improving the Quality of Sexual History Disclosure: Emphasis on a Polygraph Examination
Studied 52 sex offenders; polygraph group disclosed more deviant sexual behaviors than comparison group, confirming SHDE effectiveness[41]Verified Polygraph Examination of British Sexual Offenders: A Pilot Study
Early UK pilot demonstrating the feasibility and effectiveness of SHDE polygraph testing with British sexual offenders[42]Verified Sexual History Disclosure Polygraph Outcomes: Do Juvenile and Adult Sex Offenders Differ?
Found both juvenile and adult sex offenders disclosed significantly more victims and offense types during polygraph-assisted interviews[43]Verified The Sexual History Polygraph Examination and Its Influences on Recidivism
Found recidivists underwent fewer polygraph examinations on average and went longer periods between tests[44]Verified Improving the Quality of Sexual History Disclosure on Sex Offenders: Emphasis on a Polygraph Examination (Kim et al.)
Study of 52 sex offenders in South Korea confirmed polygraph group disclosed more deviant behaviors and paraphilic interests than comparison group. For training pathways in specific states, see our guide to Hawaii Polygraph Training.
International Expansion and Global Influence
From American Association to Global Leader
The APA has grown from a domestic professional body into the world's leading polygraph association. A 2021 survey published in Applied Cognitive Psychology found that the APA had members from 58 countries [4]Verified A Comprehensive Meta-Analysis of the Comparison Question Polygraph Test
Confirms APA had more than 2,800 members from 58 countries as of 2019, with polygraph examiners identified in 65 countries worldwide. Independent searches identified resident polygraph examiners in 65 countries, with 24 professionally recognised training schools and 12 professional organisations with international memberships [4]Verified A Comprehensive Meta-Analysis of the Comparison Question Polygraph Test
Confirms APA had more than 2,800 members from 58 countries as of 2019, with polygraph examiners identified in 65 countries worldwide.
The APA's influence extends to countries with their own distinct polygraph traditions. By 2009, polygraph testing had become one of the most widespread credibility assessment tools in Bulgaria [45]Verified The History of Polygraph Use in Bulgaria
By 2009, polygraph testing had become one of the most widespread credibility assessment tools in Bulgaria. Poland's unique Cold War polygraph history, documented by Widacki (2013), reveals that the term 'polygraph' was already in use in Polish physiological literature in the 19th century [46]Verified History of Polygraph Examinations in Poland
The term 'polygraph' was already in use in Polish physiological literature in the 19th century; documents Poland's unique Cold War polygraph history. Other regions, including the South African Polygraph Association (SAPPA), have developed their own professional standards while maintaining alignment with APA principles.
International Training and Knowledge Exchange
APA-accredited schools have trained hundreds of government polygraph examiners internationally, including government officials from countries across Asia, Europe, Latin America, and Africa. The APA's annual seminars draw international attendees, and its published standards serve as templates for polygraph legislation and regulation worldwide.
The APA's commitment to evidence-based practice, documented through peer-reviewed research in the journal Polygraph and validated through the 2011 meta-analysis [6]Verified Meta-Analytic Survey of Criterion Accuracy of Validated Polygraph Techniques
Confirms the 2011 meta-analysis found 87% accuracy across 38 studies with 11,737 scored results, and 89% for event-specific diagnostic testing, provides the scientific foundation that supports international adoption of polygraph testing. Modern instruments like the LXEdge software platform and innovations in polygraph equipment enable examiners worldwide to implement APA-validated techniques with digital precision.
The Modern APA: Structure and Governance
Organisational Structure
The APA's national office is located in Chattanooga, Tennessee [3]Verified About the APA — American Polygraph Association Official Website
Confirms APA represents more than 2,800 examiners, is governed by 11 elected officers, headquartered in Chattanooga, Tennessee, and that accredited schools teach fundamental techniques achieving accuracy rates exceeding 90%. The organisation is governed by a board of 11 officers elected by the membership, representing government, law enforcement, private practice, education, and the public [3]Verified About the APA — American Polygraph Association Official Website
Confirms APA represents more than 2,800 examiners, is governed by 11 elected officers, headquartered in Chattanooga, Tennessee, and that accredited schools teach fundamental techniques achieving accuracy rates exceeding 90%. The APA represents more than 2,800 experienced polygraph examiners in private business, law enforcement, and government [3]Verified About the APA — American Polygraph Association Official Website
Confirms APA represents more than 2,800 examiners, is governed by 11 elected officers, headquartered in Chattanooga, Tennessee, and that accredited schools teach fundamental techniques achieving accuracy rates exceeding 90%.
Importantly, the APA does not certify individuals — it accredits training programs and establishes standards that its members must follow [14]Verified American Polygraph Association — Wikipedia
Confirms APA established 1966, approximately 2,800 members, Chris Gugas demonstrated polygraph on Groucho Marx's show, and that the APA does not certify individuals. This distinction means that holding an APA membership signifies adherence to the organisation's standards of practice and code of ethics, while individual competency is assessed through completion of accredited training and, where applicable, state licensing requirements.
The APA's Enduring Legacy
Nearly six decades after its founding, the APA continues to evolve. The organisation remains committed to advancing the science of credibility assessment through research, maintaining the highest professional standards through its accreditation and continuing education programs, and advocating for the appropriate use of polygraph testing in law enforcement, government screening, and the criminal justice system.
The APA's 2011 meta-analysis, demonstrating 89% accuracy for event-specific diagnostic testing across validated techniques [6]Verified Meta-Analytic Survey of Criterion Accuracy of Validated Polygraph Techniques
Confirms the 2011 meta-analysis found 87% accuracy across 38 studies with 11,737 scored results, and 89% for event-specific diagnostic testing, represents the kind of rigorous evidence-based approach that has characterised the association since its founding. As new technologies emerge in the field of credibility assessment, the APA's role as the profession's standard-setting body ensures that innovation is guided by scientific evidence and ethical practice.
For those exploring the profession, polygraph testing remains a rewarding career path. The common myths about beating polygraph tests are regularly debunked by research, and real-world applications — from theft investigations to Secret Service screening — demonstrate the enduring value of properly administered polygraph examinations.
For a look at the instruments that helped build the profession, explore our guide to the Keeler Polygraph Model 302 and the innovations introduced by John Reid's polygraph chair.
Frequently Asked Questions
When was the American Polygraph Association founded?
The APA was incorporated in 1966 in Washington, D.C. [1]Verified APA Terminology Reference for the Science of Psychophysiological Detection of Deception (2022)
Confirms the APA was incorporated in 1966 in Washington, D.C., from merger of five organizations including the Academy of Scientific Interrogation, American Academy of Polygraph Sciences, National Board of Polygraph Examiners, International Association of Polygraph Examiners, and International Association for Polygraph Research. It resulted from the merger of five predecessor polygraph associations: the Academy of Scientific Interrogation, the American Academy of Polygraph Sciences, the National Board of Polygraph Examiners, the International Association of Polygraph Examiners, and the International Association for Polygraph Research [1]Verified APA Terminology Reference for the Science of Psychophysiological Detection of Deception (2022)
Confirms the APA was incorporated in 1966 in Washington, D.C., from merger of five organizations including the Academy of Scientific Interrogation, American Academy of Polygraph Sciences, National Board of Polygraph Examiners, International Association of Polygraph Examiners, and International Association for Polygraph Research.
How many members does the APA have?
The APA represents more than 2,800 experienced polygraph examiners in private business, law enforcement and government [3]Verified About the APA — American Polygraph Association Official Website
Confirms APA represents more than 2,800 examiners, is governed by 11 elected officers, headquartered in Chattanooga, Tennessee, and that accredited schools teach fundamental techniques achieving accuracy rates exceeding 90%. The APA's own website describes its membership as 2,700+ members [47]Verified APA Homepage — Established 1966
Confirms APA established in 1966 as the world's leading association dedicated to evidence-based scientific methods for credibility assessment with 2700+ members, while the 2021 Honts & Thurber meta-analysis in Applied Cognitive Psychology reported members from 58 countries [4]Verified A Comprehensive Meta-Analysis of the Comparison Question Polygraph Test
Confirms APA had more than 2,800 members from 58 countries as of 2019, with polygraph examiners identified in 65 countries worldwide.
Where is the APA headquartered today?
The APA's national office is located in Chattanooga, Tennessee [3]Verified About the APA — American Polygraph Association Official Website
Confirms APA represents more than 2,800 examiners, is governed by 11 elected officers, headquartered in Chattanooga, Tennessee, and that accredited schools teach fundamental techniques achieving accuracy rates exceeding 90%. The organisation is governed by a board of 11 officers elected by the membership, representing government, law enforcement, private practice, education, and the public [3]Verified About the APA — American Polygraph Association Official Website
Confirms APA represents more than 2,800 examiners, is governed by 11 elected officers, headquartered in Chattanooga, Tennessee, and that accredited schools teach fundamental techniques achieving accuracy rates exceeding 90%.
What training does the APA require for polygraph examiners?
APA-accredited polygraph training programs require a minimum of 400 hours of in-residence study [2]Verified PEAK Basic Polygraph Examiner's Course
Confirms APA-accredited basic polygraph course consists of a minimum of 400 hours[26]Verified APA-Accredited Polygraph Training — CIA Agent Education
Confirms APA-accredited programs require a minimum of 400 hours of in-residence study completed in 10 to 17 weeks with 95% faculty instruction. This must be completed in 10 to 17 weeks, with at least 95% of instruction delivered by recognised faculty [26]Verified APA-Accredited Polygraph Training — CIA Agent Education
Confirms APA-accredited programs require a minimum of 400 hours of in-residence study completed in 10 to 17 weeks with 95% faculty instruction. The curriculum covers physiology, psychology, validated techniques, chart analysis, ethics, and supervised practical examinations.
What continuing education does the APA require?
Practicing examiners must complete a minimum of 30 continuing education hours every two years in coursework related to the field of polygraphy [29]Verified APA Policy for Continuing Education Hours
Confirms practicing examiners must complete a minimum of 30 continuing education hours every two years. A practicing examiner is defined as any member who has conducted polygraph training, quality assurance, or examinations in the previous two years [29]Verified APA Policy for Continuing Education Hours
Confirms practicing examiners must complete a minimum of 30 continuing education hours every two years.
Does the APA certify individual polygraph examiners?
No. The APA establishes minimum standards for the education and training of polygraph examiners and offers accreditation to programs that meet those standards, but the association does not accredit or certify individuals [14]Verified American Polygraph Association — Wikipedia
Confirms APA established 1966, approximately 2,800 members, Chris Gugas demonstrated polygraph on Groucho Marx's show, and that the APA does not certify individuals. Individual competency is assessed through completion of accredited training and, where applicable, state licensing requirements.
How many states require polygraph licensing?
According to APA survey data, approximately 25 states have specific licensing requirements for polygraph examiners [37]Verified State Regulations and Their Influence on Polygraph Licensing
Confirms approximately 25 states have specific licensing requirements for polygraph examiners per APA survey. Requirements vary significantly — some states mandate completion of a 400-hour training program and state exams, while others have no licensing requirements at all [37]Verified State Regulations and Their Influence on Polygraph Licensing
Confirms approximately 25 states have specific licensing requirements for polygraph examiners per APA survey.
What is the APA's journal called and when did it start?
The APA has published its peer-reviewed journal, Polygraph, since 1972 [5]Verified APA Polygraph Journals 1972-2008 Archive
Confirms the journal Polygraph has been published since 1972 with archived issues available. Volume 1 appeared in September 1972. The journal instituted expert peer review in 2003 [6]Verified Meta-Analytic Survey of Criterion Accuracy of Validated Polygraph Techniques
Confirms the 2011 meta-analysis found 87% accuracy across 38 studies with 11,737 scored results, and 89% for event-specific diagnostic testing. Past editor Don Krapohl and NCCA librarian Katie Baldwin compiled a comprehensive database of articles from 1972–2018 [30]Verified Citations from Journal Polygraph 1972-2018
Confirms comprehensive searchable database of Polygraph journal articles from 1972-2018 compiled by Don Krapohl and Katie Baldwin.
What accuracy rate has APA research demonstrated for polygraph testing?
The APA's 2011 meta-analysis of 38 studies found that event-specific diagnostic testing produced an aggregated decision accuracy of 89%, while the combination of all validated techniques produced 87% accuracy with a 13% inconclusive rate [6]Verified Meta-Analytic Survey of Criterion Accuracy of Validated Polygraph Techniques
Confirms the 2011 meta-analysis found 87% accuracy across 38 studies with 11,737 scored results, and 89% for event-specific diagnostic testing. APA-accredited schools teach fundamental techniques achieving accuracy rates exceeding 90% [3]Verified About the APA — American Polygraph Association Official Website
Confirms APA represents more than 2,800 examiners, is governed by 11 elected officers, headquartered in Chattanooga, Tennessee, and that accredited schools teach fundamental techniques achieving accuracy rates exceeding 90%.
What was the Employee Polygraph Protection Act and how did it affect the APA?
The EPPA became law on December 27, 1988 [34]Verified Employee Polygraph Protection Act of 1988 — 29 CFR § 801.1
Confirms EPPA became effective December 27, 1988, prohibiting most private employers from using lie detector tests, prohibiting most private employers from using polygraph tests [35]Verified Employee Polygraph Protection Act — Wikipedia
Confirms EPPA is a 1988 federal law preventing most private employers from using polygraph tests, with exemptions for security firms and government agencies. The APA advocated for strict training and testing standards as an alternative to the ban [36]Verified Employee Polygraph Protection Act of 1988: Background and Implications
Confirms the APA advocated for strict standards for training and testing as an alternative approach to the EPPA ban, and EPPA eliminated 85% of existing tests. While EPPA eliminated an estimated 85% of private-sector tests [36]Verified Employee Polygraph Protection Act of 1988: Background and Implications
Confirms the APA advocated for strict standards for training and testing as an alternative approach to the EPPA ban, and EPPA eliminated 85% of existing tests, it ultimately elevated professional standards by concentrating practice in regulated contexts.
Sources & References
Confirms the APA was incorporated in 1966 in Washington, D.C., from merger of five organizations including the Academy of Scientific Interrogation, American Academy of Polygraph Sciences, National Board of Polygraph Examiners, International Association of Polygraph Examiners, and International Association for Polygraph Research
Confirms APA-accredited basic polygraph course consists of a minimum of 400 hours
Confirms APA represents more than 2,800 examiners, is governed by 11 elected officers, headquartered in Chattanooga, Tennessee, and that accredited schools teach fundamental techniques achieving accuracy rates exceeding 90%
Confirms APA had more than 2,800 members from 58 countries as of 2019, with polygraph examiners identified in 65 countries worldwide
Confirms the journal Polygraph has been published since 1972 with archived issues available
Confirms the 2011 meta-analysis found 87% accuracy across 38 studies with 11,737 scored results, and 89% for event-specific diagnostic testing
Comprehensive review of CQT and CIT methods, polygraph history from early instruments to modern practice
Confirms Keeler moved to Chicago in 1930 to work at the Scientific Crime Detection Laboratory at Northwestern University, headed the polygraph department
Confirms the SCDL was established in Fall 1929 at Northwestern University's Law School, with Leonarde Keeler heading the polygraph department
Confirms the Scientific Crime Detection Laboratory was established in 1929 at Northwestern University as America's first independent forensic crime laboratory
Confirms Inbau came to Northwestern as a research assistant in the SCDL in 1933, became director in 1938, returned as law professor in 1945, and published 50+ journal articles and 18 books
Confirms Inbau published more than 50 journal articles and 18 books, founded Americans for Effective Law Enforcement in 1966, and had a long association with John E. Reid
Confirms Backster was chairman of the Research and Instrument Committee of the Academy for Scientific Interrogation, and founded the CIA's polygraph unit
Confirms APA established 1966, approximately 2,800 members, Chris Gugas demonstrated polygraph on Groucho Marx's show, and that the APA does not certify individuals
Confirms the Backster Zone Comparison Technique was the first polygraph interpretation system to use numerical evaluation
Confirms Backster published his Standardized Polygraph Notepack and Technique Guide for the Zone Comparison Technique in 1963
Confirms Backster instituted the CIA's polygraph examination program in 1949 and founded the Backster School of Lie Detection in 1951
Confirms Chris Gugas was a founding member and past president of the APA, administered 40,000+ polygraph examinations, and polygraphed James Earl Ray
Confirms Gugas founded three polygraph organisations, administered over 40,000 tests, and demonstrated polygraph on Groucho Marx's show in the 1950s
Confirms Chris Gugas demonstrated the polygraph on Groucho Marx's You Bet Your Life about 10 years before the APA's founding
Confirms Dr. Chris Gugas founded the National Polygraph Association in March 1989
Confirms the 1963 publication date for Backster's standardised zone comparison technique guide
Confirms Richard O. Arther published in the Journal of Polygraph Science, with citations spanning from the 1980s through the 1990s
Confirms multiple Arther publications in the Journal of Polygraph Science including volumes from 1982 and 1987
Confirms research standards approved by APA Board of Directors on March 11, 2011
Confirms APA-accredited programs require a minimum of 400 hours of in-residence study completed in 10 to 17 weeks with 95% faculty instruction
Confirms AIIP is one of only eleven APA-accredited institutions in the U.S. teaching the 400-hour Basic Polygraph Examiner Course
Confirms PEAK is APA-accredited and is a subsidiary of Lafayette Instrument Company, opened in 2016
Confirms practicing examiners must complete a minimum of 30 continuing education hours every two years
Confirms comprehensive searchable database of Polygraph journal articles from 1972-2018 compiled by Don Krapohl and Katie Baldwin
Confirms the November 1983 OTA technical memorandum reviewing scientific evidence on polygraph validity for the House Committee on Government Operations
Confirms OTA concluded no overall measure of polygraph validity could be established, but acknowledged the control question technique had some validity in criminal investigations
Reanalysis of OTA data finding field studies, analog studies, and guilty knowledge studies produced average accuracy of 82% to 88%
Confirms EPPA became effective December 27, 1988, prohibiting most private employers from using lie detector tests
Confirms EPPA is a 1988 federal law preventing most private employers from using polygraph tests, with exemptions for security firms and government agencies
Confirms the APA advocated for strict standards for training and testing as an alternative approach to the EPPA ban, and EPPA eliminated 85% of existing tests
Confirms approximately 25 states have specific licensing requirements for polygraph examiners per APA survey
Comprehensive APA directory of state licensing boards and associations with contact information for each jurisdiction
Confirms an additional 40-hour trained to APA standards course is required for PCSOT certification
Studied 52 sex offenders; polygraph group disclosed more deviant sexual behaviors than comparison group, confirming SHDE effectiveness
Early UK pilot demonstrating the feasibility and effectiveness of SHDE polygraph testing with British sexual offenders
Found both juvenile and adult sex offenders disclosed significantly more victims and offense types during polygraph-assisted interviews
Found recidivists underwent fewer polygraph examinations on average and went longer periods between tests
Study of 52 sex offenders in South Korea confirmed polygraph group disclosed more deviant behaviors and paraphilic interests than comparison group
By 2009, polygraph testing had become one of the most widespread credibility assessment tools in Bulgaria
The term 'polygraph' was already in use in Polish physiological literature in the 19th century; documents Poland's unique Cold War polygraph history
Confirms APA established in 1966 as the world's leading association dedicated to evidence-based scientific methods for credibility assessment with 2700+ members
Early comprehensive account of lie detection history and the transition from ancient ordeals to scientific instruments
Definitive two-part history of lie detection from ancient China through modern polygraphy
The APA helped shape professional standards — to benefit from them today, find a lie detector test near you and compare pricing at locations near you.