1 - There Are Different Testing Techniques

Not all polygraph examinations in Knoxville, Tennessee, are the same. There are actually different testing techniques that are used, each with its own pros and cons. Some of the most common test formats are validity, utility, screening, and specific issue examinations. Let's take a look at the differences in these techniques.

• Validity Examinations - Validity examinations are assessments conducted with the specific, pre-agreed purpose of offering a diagnostic opinion as evidence in an ongoing legal case. These exams are known for their strong validity and reliability; however, their main limitation is that they do not account for collateral issues.
• Utility Examinations - Utility examinations are polygraph tests where all relevant questions focus on multiple aspects of the same overarching topic but remain partially or entirely independent of each other. This approach is beneficial because it considers collateral issues; however, its drawback is a reduction in result reliability.
• Screening Examinations - Screening examinations are polygraph tests used primarily for pre-employment, periodic evaluations, or security clearance purposes. Unlike specific-issue polygraphs, which focus on a single event or allegation, screening exams assess an individual's general history and behaviors.
• Specific Issue Examinations - A specific-issue polygraph examination is a type of polygraph test focused on a single, well-defined event or allegation. Unlike screening examinations, which cover broad topics, these exams are used to determine truthfulness about a particular incident. The test addresses only one allegation, such as theft, assault, or espionage. Because the scope is narrow, these exams are usually more reliable than screening polygraphs.

2 - Polygraphs Are NOT Machines

If you have ever heard someone reference a polygraph machine, that individual is speaking incorrectly. The equipment used in polygraph examinations in Knoxville, Tennessee, is not a machine it is an instrument! Machines are designed to do the work; instruments simply record data. The true magic of a polygraph comes from the human element! Once the instrument gathers the data, it is up to the polygraph examiner to interpret it and determine the result. That's why it is so important to choose the right polygraph examiner when you need polygraph examinations in Knoxville, Tennessee. You will want to work with someone who is properly trained and has the knowledge and experience to administer a reliable polygraph exam. With that in mind, it is also important to note that a polygraph isn't really a 'lie detector.' All it is doing is measuring physiological responses. It is down to your examiner to interpret those readings.

3 - Polygraph Exams Are Not Infallible

There is some degree of controversy surrounding the use of polygraphs as they are not 100% accurate. That is why they are usually not admissible in court. The accuracy of polygraph examinations in Knoxville, Tennessee, relies heavily on the skill and expertise of the person administering the exam. It is important that you look for a provider that has a proven track record in providing accurate results. At Kendall Investigations, your polygraph is conducted by our founder, Kendall Shull, the only person in the world to have achieved a Master of Science in Polygraphy. He is a registered member of the American Polygraph Association and The American Association of Police Polygraphists. Kendall has been offering private polygraph examinations in Knoxville, Tennessee, since 2001 after retiring from an accomplished career as an FBI Special Agent, where he was in charge of the entire polygraph division in Washington, DC. When it comes to experience and polygraph expertise, you will struggle to find anyone more qualified to administer your polygraph exam.

Polygraph examinations can be a useful tool when conducted by a skilled and experienced examiner, but they are not foolproof. Understanding the different testing techniques, the role of the examiner, and the limitations of polygraphs can help you approach the process with realistic expectations. If you need a reliable polygraph examination in Knoxville, Tennessee, working with a highly qualified expert like Kendall Shull at Kendall Investigations ensures you receive the most accurate results possible.