How accurate is an infidelity lie detector test?
The APA's 2011 meta-analysis of 38 studies found that single-issue diagnostic testing — the format used for infidelity polygraphs — produces an aggregated decision accuracy of 89%, with a 95% confidence interval of 83% to 95% [9]Verified Polygraph Validity Research — Meta-Analytic Survey of Criterion Accuracy
Confirms single-issue diagnostic testing produces aggregated decision accuracy of 89% (CI 83%-95%) with 11% inconclusive rate, based on 38 studies and 3,723 examinations scored by 295 independent scorers.. A separate 2021 peer-reviewed meta-analysis by Honts, Thurber, and Handler confirmed that the Comparison Question Test produces accuracy significantly greater than chance across 138 datasets [10]Verified A Comprehensive Meta-Analysis of the Comparison Question Polygraph Test
Confirms CQT polygraph test accuracy is significantly greater than chance across 138 datasets with no publication bias detected. Published in Applied Cognitive Psychology, Volume 35, pages 411-427..
How many questions can be asked during an infidelity polygraph?
Up to 3 relevant questions per single-issue examination. This focused approach is specifically designed to maximize accuracy. All questions are collaboratively developed with the examiner before testing begins and must follow APA standards: behavioral, factual, yes/no format, and specific to a defined time period.
Can my partner refuse to take the test?
Yes. Under the APA Model Policy for Relationship Polygraph Testing, participation is entirely voluntary [8]Verified APA Model Policy for Relationship Polygraph Testing
Confirms the APA adopted its Model Policy for Relationship Polygraph Testing in August 2025, establishing standards for informed consent, neutral settings, professional boundaries, and reporting.. The examinee's informed consent must be obtained independently, outside the presence of any partner or referring party. The test can be stopped at any time. No one should ever be coerced or pressured into taking a polygraph examination.
What happens if the result is inconclusive?
An inconclusive result means the examiner could not make a definitive determination of truthful or deceptive. The estimated inconclusive rate for single-issue testing is 11% [9]Verified Polygraph Validity Research — Meta-Analytic Survey of Criterion Accuracy
Confirms single-issue diagnostic testing produces aggregated decision accuracy of 89% (CI 83%-95%) with 11% inconclusive rate, based on 38 studies and 3,723 examinations scored by 295 independent scorers.. An inconclusive result is not a failure and is not held against the examinee. In most cases, a retest can be scheduled to attempt a definitive result.
Can the test detect emotional affairs and digital infidelity?
Yes. While a polygraph measures physiological responses to factual questions, the questions can be tailored to address digital and emotional infidelity — such as sending sexually explicit messages, maintaining dating profiles, or engaging in secret romantic communications. The examiner will help frame your concerns into testable behavioral questions during the consultation.
How long does the test take?
The total appointment time is approximately 2 hours. This includes the pre-test interview, question review, the polygraph examination itself, and delivery of same-day verbal results.
Are polygraph results admissible in court?
Approximately 23 states consider polygraph results admissible under certain conditions, though most require stipulation from both parties [12]Verified Admissibility of Polygraph Tests in Court
Confirms 23 states consider polygraph tests admissible in court, with the majority requiring approval of both parties before submission.. New Mexico has the most liberal admissibility rules [13]Verified Polygraph Evidence in U.S. Courts
Confirms the per se exclusion of polygraph tests is the minority view among federal circuits, and that New Mexico has the most liberal admissibility rules.. However, many clients use polygraph results for private resolution, mediation, and therapy — not court proceedings.
How much does an infidelity polygraph cost compared to a private investigator?
A polygraph test is typically a fraction of the cost of a private investigation. Standard infidelity investigations by private investigators typically range from $2,000 to $6,000, with complex cases exceeding $10,000 [11]Verified Private Investigator Cost in 2026: $50–$150/Hr
Confirms standard infidelity investigations typically range from $2,000-$6,000, with complex cases involving multiple locations or extended timeframes potentially reaching $10,000+.. A single polygraph examination costs significantly less and provides a same-day result. Visit our polygraph test prices page for current pricing.
Will my partner know I arranged the test?
Your identity and involvement remain fully confidential. The examiner does not disclose who arranged or paid for the test. Results are only shared with your explicit written consent. The APA Model Policy mandates strict confidentiality unless the examinee consents to disclosure [8]Verified APA Model Policy for Relationship Polygraph Testing
Confirms the APA adopted its Model Policy for Relationship Polygraph Testing in August 2025, establishing standards for informed consent, neutral settings, professional boundaries, and reporting..
Can nervousness cause a false result?
Normal nervousness does not cause a false result. The comparison question technique used in polygraph testing is specifically designed to account for baseline anxiety. The examiner establishes comparison responses during the pre-test phase and measures relative changes in physiological responses between different question types — not absolute levels of nervousness.