We provide a wide range of professional polygraph examinations tailored to meet personal, legal, and investigative needs across Southern California.

Domestic Issues & Fidelity Exams

• Infidelity / Cheating Suspicion

• Emotional Affairs

• Online Activity & Sexting

• Contact with Ex-Partners

• Relationship Trust Concerns

Ulterior Motives Exams

• Hidden Financial or Legal Intentions

• “Green Card” or Marriage-for-Benefit Concerns

• “Gold Digger” or Sugar Relationship Inquiries

Adverse History Exams

• Past Sexual Behavior

• History of STDs, Drug Use During Sex

• Prior Marriages, Children, or Hidden Lifestyles

• Lifetime Sexual History Disclosure

Financial Issues Exams

• Undisclosed Debts or Bankruptcies

• Hidden Bank Accounts or Credit Cards

• Secret Spending or Financial Misconduct

Unsanctioned Activities Exams

• Visiting Strip Clubs

• Viewing Pornography

• Secret Social Media Use

• Contact with Individuals Not Approved by Partner

Pre-Employment & Background Screening

• Law Enforcement & Public Safety Applicants

• Private Security & Sensitive Jobs

• Government & Civil Service Screenings

• Criminal History & Application Truthfulness

Criminal Investigation Exams

• Suspect Testing for Active Investigations

• Victim or Witness Verification

• Attorney-Requested Defense Exams

• Post-Conviction Sex Offender Testing (PCSOT)

Workplace & Internal Investigations

• Theft, Fraud, or Sabotage Allegations

• Sexual Harassment & Workplace Misconduct

• Corporate or HR-Initiated Testing

• Employee Screening for Sensitive Roles

Legal & Civil Matters Exams

• Divorce & Custody Disputes

• Business Partner Trust Issues

• Accusations in Civil Lawsuits

• Contractual & Personal Disputes

Personal Reasons Exams

• • Prove Innocence in Personal Conflicts

  • Clear One’s Name in Family or Social Disputes

  • Voluntary Testing to Rebuild Trust

At Spectrum Polygraph Services, understanding the polygraph process helps you feel confident and prepared.
Lying doesn’t just involve the mind—it triggers physical changes in the body. Even if someone appears calm, lying often increases heart rate, activates sweat glands, and alters breathing patterns, especially when the stakes feel high.
These involuntary reactions are controlled by the autonomic nervous system, the same system that makes you sweat when you’re nervous or shiver when you’re cold. A polygraph records these physiological changes, creating a chart that trained examiners interpret to assess truthfulness.

We use the Lafayette LX6 Computerized Polygraph System, one of today’s most advanced and reliable systems.
During the exam, sensors monitor several key physiological responses:

• Pneumographs (Breathing): Belts around your chest track breathing patterns.
• Electrodermal Activity Sensors (EDA): Attached to your fingers to measure sweat gland activity.
• Cardiovascular Cuff: Worn on your bicep to monitor heart rate and blood pressure (it feels snug but is not painful).
• Photoelectric Plethysmograph (PLE): Measures blood pulse volume in the fingers.
• Motion Detection Pad: Placed under your seat to detect excessive movement.

These tools comprehensively measure your body’s psychophysiological responses during the examination.

Our examiners are extensively trained to interpret data using computer algorithms and manual analysis. We follow strict professional and ethical standards.
Examiners:

• Create a comfortable, respectful environment.
• Use scoring systems validated by research.
• Distinguish natural nervousness from deceptive responses.
  All exams are confidential and audio/video recorded for accuracy, quality assurance, and examiner training.

It’s normal to feel nervous during a polygraph. Nervousness alone will not cause you to “fail” an exam.
Our examiners are trained to differentiate between:

• Nervous, anxious responses
• Physiological changes triggered by deception
  Just be honest, follow instructions, and you’ll be fine.

You will answer a series of reviewed, yes-or-no questions related to the agreed-upon issue.
The examiner will guide you through everything, ensuring you understand each question before testing begins.

Pricing depends on the type of test and case complexity. We offer competitive, transparent rates and will discuss costs during your consultation.

Contact us by phone or through our website! We’ll guide you through selecting the proper test and booking an appointment that fits your schedule.

• A valid driver’s license or government-issued photo ID.
• The remaining payment is due at the time of the exam.

While people have tried to “beat” polygraphs using countermeasures, experienced examiners are trained to detect such attempts.
If countermeasures are suspected, the examiner may terminate the exam. No refund will be provided

Yes, but we require a signed waiver from your primary care physician approving the exam before proceeding.

A domestic issue polygraph exam is designed to help resolve concerns within a personal relationship—typically between romantic partners or spouses. These exams can address suspected infidelity, financial secrecy, hidden communication, and more.

Questions are objective, specific, and based on agreed-upon definitions. Common topics include:

• Sexual activity with others

• Online flirting or messaging

• Contact with ex-partners

• Visits to adult entertainment venues

• Use of dating apps or hidden social media profiles

All polygraph questions must be:

• Objective and factual (no opinions)
• Clearly worded with only one possible interpretation
• Answerable with “yes” or “no.” Sexual matters will not be addressed unless directly relevant to the case.
  Example:
• Bad: “Did you ever cheat on your husband?”
• Good: “Since marrying Jim, have you had sexual intercourse with anyone other than Jim?”

Questions must be related to each other. If distinctly different topics must be covered, separate exams are required.

Generally, we can cover up to four (4) relevant questions per exam if they’re related.
Adding more questions or unrelated topics will require additional exams. This ensures reliability and accuracy.

• Private Individuals and Families: To resolve personal disputes, infidelity, addiction, abuse cases, etc.
• Therapists: As part of treatment plans (e.g., sex addiction recovery).
• Attorneys: For pre-trial verification, witness vetting, or defense strategies.
• Employers: Especially in security-sensitive industries.
• Law enforcement, federal agencies, and the military: This is for applicant screening, criminal investigations, and national security matters.

Polygraph results are often used outside the courtroom for pre-trial negotiations, sentencing recommendations, and credibility assessments.
While admissibility in court varies by jurisdiction, most legal professionals value polygraph results as a powerful investigative tool.

Yes. All relevant questions are thoroughly reviewed with the client and examinee before testing begins. Both parties must agree to the wording and scope of the questions.

Polygraph exams cannot “prove” infidelity the way a photo or video might, but they are highly effective in confirming or ruling out specific behaviors with a high degree of accuracy—typically around 90% with properly conducted exams.

Absolutely. All information shared before, during, and after the exam is kept strictly confidential. We do not share results with anyone other than the client and examinee without written consent.

Yes. In some cases, both individuals in a relationship may take separate polygraph exams to address mutual concerns. This can support a more balanced and transparent resolution process.

A typical exam lasts 90 to 120 minutes, including a detailed interview, review of questions, and the test itself. Extra time may be needed if multiple issues are being addressed.

Get a full night’s sleep, avoid caffeine and alcohol, and arrive on time. Bring valid ID and a clear understanding of the concerns you want addressed. Be prepared to speak openly during the pre-test interview.

In most civil or domestic situations, polygraph results are not automatically admissible in court. However, they can be used for mediation, counseling, or personal closure. In some cases, results may be accepted if both parties agree.

Refusal does not necessarily indicate guilt, but it may raise additional doubts for the requesting party. If someone declines the test, we suggest counseling or mediation as a next step to address trust issues.