Explore the world of polygraph results and their significance. Learn how Carlson Polygraph can help you discover the truth.
Polygraph examinations, commonly known as lie detector tests, play a significant role in various fields, including criminal investigations, employment screenings, and personal matters. They are designed to detect deception by measuring physiological responses such as heart rate, blood pressure, and respiration. Understanding the results of a polygraph test is crucial for both the examinee and the examiner.
Discover the different outcomes of polygraph tests and what they mean.
NDI / NSR – No Deception Indicated / No Significant Response:
These results are often referred to as the examinee being found truthful. When the polygraph chart analysis shows NDI or NSR, it means that no significant involuntary physiological reactions were detected during the test. This suggests that the individual answered all relevant questions truthfully and without deceit.
DI / SR – Deception Indicated / Significant Response:
Conversely, when the test results indicate DI or SR, it means the examinee was found deceptive in one or more of the pertinent questions. Significant changes in involuntary physiological reactions, such as increased heart rate or perspiration, consistently appeared during the test. These reactions are scientifically explained as indicators of deception.
INCONCLUSIVE:
Sometimes, polygraph results fall into the inconclusive category. In such cases, the examiner could not reach a definitive decision based on the analysis of the polygraph charts. There are various potential reasons for inconclusive results, such as nervousness or stress. To enhance the reliability and validity of conclusive test results, the inconclusive category serves as a buffer zone. Often, additional information from the examinee or modifications to the test questions are required before administering a follow-up test.
PNC – Purposely Non Cooperative:
A PNC result indicates that the examinee did not cooperate with the examiner’s instructions or attempted to use counter-measures during the test. Counter-measures are actions taken to manipulate or deceive the polygraph, and experienced examiners, using sophisticated equipment and sensors, can often detect them. A PNC result is essentially a refusal by the examinee to take the test seriously or engage honestly in the examination.
Understanding polygraph results is essential for both the individuals undergoing the test and the professionals administering it. While NDI / NSR results signify truthfulness, DI / SR results indicate potential deception. Inconclusive results call for further examination or clarification, and PNC results suggest non-cooperation or an attempt to manipulate the test.
It’s important to remember that polygraph results should be interpreted by experienced examiners who consider all relevant factors and context. The science of polygraphy continues to evolve, and while it can provide valuable insights, it is not infallible. Therefore, the interpretation of results should always be approached with care and consideration of the broader circumstances surrounding the examination.
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