Using the Polygraph Validation Test (PVT) in Solving Conflicted Polygraph Results and Confirming Deliberate Distortions by Examinees

This field study examined the application of the Polygraph Validation Test (PVT) across 51 re-examinations of original polygraph tests that produced conflicted results or where deliberate distortions were suspected. The PVT was successfully employed to rectify original testing problems and confirm suspected countermeasure or augmentation attempts by examinees.

Field study of 51 polygraph re-examinations using the Integrated Zone Comparison Technique (IZCT) with the Polygraph Validation Test (PVT) protocol, examining cases with conflicted original outcomes or suspected countermeasure employment.

This field study by Tuvia Shurany examined the effectiveness of the Polygraph Validation Test (PVT) in addressing two critical challenges: resolving inconclusive polygraph results and confirming suspected countermeasure attempts. Using the Integrated Zone Comparison Technique across 51 real field re-examinations, the study analyzed cases where original tests produced conflicted outcomes or where deliberate chart distortion was suspected. The PVT successfully resolved problems in all cases, with analysis revealing diagnostic patterns such as classic POT reactions that indicated improper psychological focus during original examinations. The research provided practical evidence for a quality assurance tool that addresses real-world testing challenges encountered by practicing polygraph examiners.

This research provides polygraph examiners with an empirically-supported quality control procedure for addressing inconclusive results and suspected countermeasures in field practice. The PVT offers a systematic approach to validate original test results and confirm deliberate distortions, enhancing the reliability of polygraph examinations in real-world settings.

Background & Context

The Polygraph Validation Test (PVT) represents an innovative methodological approach originally developed to address two critical challenges in polygraph practice: protecting against false positive outcomes and confirming suspected countermeasure attempts by examinees. The technique was specifically designed to assist examiners in overcoming denials from individuals later verified as deceptive, filling a significant gap in quality control procedures.

This 2015 study by Tuvia Shurany extends the application of the PVT beyond its original scope, exploring its utility in resolving inconclusive or conflicted test results that plague field practice. When original polygraph examinations produce ambiguous outcomes or when examiners suspect deliberate chart distortion through countermeasures or augmentation techniques, the need for a reliable validation procedure becomes paramount. Prior to this work, examiners had limited empirical guidance on how to systematically address such problematic cases.

The research builds upon Shurany's earlier work with the Integrated Zone Comparison Technique (IZCT) and his 2011 paper introducing the Polygraph Verification Test concept. By applying the PVT methodology to actual field cases with known outcomes, this study provides practical evidence for a quality assurance tool that addresses real-world testing challenges encountered by practicing polygraph examiners.

Research Design & Methodology

The study examined fifty-one (51) re-examinations of original polygraph tests conducted in field settings. These cases involved original polygraph tests that resulted in conflicted outcomes and examinations where deliberate distortions were believed to have been employed. The research utilized real field cases rather than laboratory simulations, providing ecological validity to the findings.

The methodology employed the Integrated Zone Comparison Technique (IZCT) as the primary testing format for both original and validation examinations. When conducting the PVT re-examination, comparison question C4 referred to the Comparison Questions in the original test, and question R5 referred to the Relevant target issue. This allowed examiners to determine whether the examinee's psychological set was inappropriately focused during the original examination.

Key methodological elements included:

• Use of the IZCT format with standardized question structures addressing both the original test issues and potential distortion behaviors
• Evaluation of examinees suspected of using countermeasures (deliberate attempts to appear truthful) or augmentations (deliberate attempts to appear deceptive)
• Analysis of physiological response patterns, including classic "POT reactions" (point of deception patterns showing decrease to the deception point then increase)
• Three to four chart collection standard, with Chart IV added when needed for clarification

Results & Key Findings

The PVT was successfully employed across all 51 re-examinations to rectify the original testing problems and/or confirm suspected countermeasure attempts. The Polygraph Validation Test was successfully employed in these re-examinations to rectify the original problems and/or confirm attempts by examinees at countermeasures or augmentations.

Analysis of response patterns revealed critical diagnostic indicators of attempted chart manipulation. In one documented case involving a non-deceptive result on the original examination, the examinee's most salient questions drawing his psychological set were C4 (classic POT reaction) 'Did you lie to any of the personal questions?' and C6, 'Did you try to influence the result of the exam?' This pattern indicated the examinee's attention was improperly focused on the comparison questions rather than the relevant issues, suggesting countermeasure employment.

Key outcomes included:

• 100% success rate in identifying the source of conflicted results across all 51 cases
• Successful confirmation of deliberate distortion attempts when suspected by examiners
• Resolution of ambiguous findings from original examinations through focused questions about test manipulation
• Identification of classic physiological markers indicating psychological set manipulation, particularly POT reactions to countermeasure-related questions

Discussion & Significance

This research demonstrates that the PVT functions effectively as both a quality assurance tool and a countermeasure detection method in operational polygraph practice. The findings address a critical weakness in standard polygraph procedures: the lack of systematic approaches for handling inconclusive results or suspected test manipulation. By providing examiners with a structured methodology for investigating problematic outcomes, the PVT enhances the overall reliability of polygraph testing in the field.

The study's significance lies in its practical applicability to real-world testing scenarios. Unlike laboratory research that may not capture the complexities of field examinations, this work demonstrates the PVT's utility with actual examinees who had genuine stakes in the testing outcomes. The ability to identify whether an examinee's psychological set was improperly focused—whether through deliberate manipulation or other factors—provides examiners with diagnostic capabilities beyond standard test formats.

The research contributes to the broader polygraph literature on countermeasure detection, an area of growing concern as information about polygraph techniques becomes more widely accessible. The documented case examples, including instances where examinees showed physiological evidence of attention to comparison questions rather than relevant issues, provide valuable templates for practitioners identifying similar patterns in their own casework.

Limitations & Considerations

While the study demonstrates successful application of the PVT across 51 cases, several methodological considerations warrant attention. The research does not specify the ground truth criteria used to confirm that the PVT results were accurate—that is, how the author determined the PVT successfully "rectified" the original problems. Without independent verification criteria beyond the PVT itself, the circular nature of validation presents interpretive challenges.

Additional limitations include:

• Lack of detailed statistical analysis or inter-rater reliability data on PVT interpretation
• No comparison group of cases where PVT was not applied, limiting causal inference about its necessity
• Limited information about the base rate of countermeasure attempts in the sample, making it difficult to assess detection sensitivity and specificity
• Absence of information about examiner training requirements or consistency in PVT application across cases
• No discussion of potential false positive identifications of countermeasure use or how to distinguish deliberate manipulation from other sources of test distortion

Practical Applications

For practicing polygraph examiners, this research provides a structured protocol for addressing two common field challenges: inconclusive test results and suspected countermeasure employment. When an original examination produces conflicted outcomes or when an examiner observes indicators suggesting test manipulation, the PVT offers a systematic re-examination approach. By incorporating specific questions about the examinee's behavior during the original test—particularly whether they lied to comparison questions or attempted to influence results—examiners can assess whether the original outcome reflected genuine physiological responses or artificial manipulation.

Consumers of polygraph services and oversight authorities should recognize that quality assurance procedures like the PVT can enhance testing reliability when properly applied. The research suggests that not all ambiguous polygraph results reflect fundamental test limitations; some may result from examinee manipulation that can be detected and corrected through appropriate follow-up procedures. However, the effectiveness of such quality control measures depends on examiner skill, appropriate training, and clear protocols for determining when re-examination is warranted versus when results should simply be deemed inconclusive.