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Infidelity Testing

Relationship Lie Detector Test

When trust is lost in a relationship, it could take years to recover, if ever. In many cases the evidence of adultery is not definitive, so the only way to find out the truth is through an infidelity test from a qualified polygraph examiner.

Infidelity Test

Infidelity Polygraph Tests are used extensively for relationship issues. This is one area of testing where experience makes a big difference. The wording of questions for a relationship lie detector test is critical to a successful exam, since many words can be interpreted differently by different people. See below for Question Design Rules for infidelity polygraph tests.

In 2012, GPN Owner Michael Martin published the first textbook for Domestic Issue (relationship) polygraph testing. All of the examiners in the Global Polygraph Network™ are experienced and qualified to provide these types of exams.


Cheating/Fidelity Infidelity Test

This format is used to determine whether one partner has had sexual contact with anyone else besides his/her partner. Other related items may include questions about dating, kissing, having contact with "exes," placing personal ads, visiting strip clubs, etc.

Personal History Infidelity Test

This format is appropriate when a partner needs to verify aspects of his/her partner's background, such as sexual history, drug or alcohol habits, gambling, health issues (particularly STD's), and excessive financial obligations.

Internet Activities Infidelity Test

Not all "cheating" requires physical contact. Polygraph can be used to determine the extent of "sexual" activities conducted over the internet, such as visits to pornographic sites, dating sites, sexual chat rooms, interactive sexual web sites, or having "cybersex" (sexual chat) with someone who is not his/her partner.


There are quite a few rules for designing proper relationship polygraph questions. Your examiner will work with you to develop the best questions for your situation, but here are some of the basic rules for question design.

  • Relevant infidelity polygraph test questions are typically answered with the word "no." Narrative answers are not permitted.
  • Remember that the number of infidelity test questions asked affects the accuracy of the test. The more questions you ask, the less accurate the results will be. A specific issue test (one question) will give you results with the highest accuracy. The most questions that can be asked in an exam is typically 3 to 4. After you exceed 4 relevant questions in a single exam the results will have no reliability at all.
  • Questions can not be subjective or ambiguous. Each question must be interpreted the same way by any person who hears it. When in doubt, specific words or phrases can be defined and agreed-upon before the exam. Some examples of words that are not permitted are "cheating," "affair," and "inappropriate." Questions must be direct and to the point, such as "During your marriage, did you have sexual contact with anyone other than your husband?"
  • Lengthy infidelity test questions are not permitted.  A question that takes more than 6 or 7 seconds to ask (using normal speech) is too long.
  • Hypothetical questions are not permitted.
  • Questions about opinions, emotions, intentions, feelings, or the future can not be used. For example, we can not ask "Do you love your wife?" or "Do you plan to leave your wife?," but we can ask "Did you tell someone that you do not love your wife?" and "Did you tell anyone that you were going to leave your wife?"
  • Compound (multi-part) questions are not generally used.
  • Infidelity test Questions about lying are not generally used. Relationship polygraph questions are asked in the most direct way possible. For example, we would ask "Did you have sex with someone other than your wife?" and not "Did you lie to your wife about having sex with someone else?"
  • Questions in the same exam must be related to one another. Examiners can not mix issues in a test. For example, an examiner can not ask questions about "sexual issues" and "financial issues" in the same exam. Each new issue requires a separate exam.