Stanley M. Slowik

Stanley M. Slowik received his polygraph training from Reid College in Chicago in 1973 and was employed as a polygraph examiner, Director, criminal interrogator and instructor with John E. Reid & Associates from 1968 to 1986. He is President of Stanley M. Slowik, Inc., based in Evergreen, Colorado, where he has operated as an independent practitioner, researcher, and expert witness. Slowik is a practitioner, instructor, researcher and expert witness in the fields of forensic interviewing, polygraph and criminal interrogation. He is recognized as a nationally recognized polygraph examiner, and has qualified as an expert regarding polygraph, interviewing and interrogation over the past 40 years.

Slowik's research contributions span both historical scholarship and field validity studies. His 2019 article "Chicago: Where Polygraph Becomes a Science," co-authored with Frank S. Horvath, examined the development of polygraph as a scientific discipline in early 20th-century Chicago, documenting contributions of pioneers like John E. Reid, Leonarde Keeler, and John Larson. His 2020 work "Critical Changes Over the 100 Year Evolution of Polygraph Practices" traced the technical and procedural developments in polygraph methodology. Slowik's empirical research includes his 1975 study on the relative accuracy of polygraph examiner diagnosis across different physiological channels (respiration, blood pressure, and GSR) and his 1983 analysis of OTA-qualifying field studies examining the validity of the Comparison Question Test (CQT) in real-world applications.

Beyond core polygraph research, Slowik has been a frequent contributor to professional literature on legal and practical issues affecting polygraph examiners. He has published extensively on employment law topics including the Americans with Disabilities Act (ADA), the Employee Polygraph Protection Act (EPPA), and medical marijuana policies in pre-employment screening. Slowik is a frequent contributor to Polygraph, the journal of the American Polygraph Association. In 2013, Stanley M. Slowik received the American Polygraph Association's highest honor, recognizing his sustained contributions to the field. He has also co-authored book reviews and critical analyses with Frank S. Horvath, examining fundamental concepts in polygraph practice and advocating for the integration of extra-polygraphic information in examiner decision-making.

Slowik's work bridges practitioner expertise and academic scholarship. His collaborations with prominent researchers including Frank S. Horvath reflect his role in connecting field experience with research validation. His expertise extends to forensic interviewing and interrogation techniques, particularly their application to specialized populations such as children, as evidenced by his 2008 article on forensic interviewing, polygraph, and child deception. Through his company and expert witness work, Slowik has influenced both the scientific understanding and practical application of credibility assessment techniques across law enforcement, private sector, and legal contexts.