Polygraph and Therapeutic Disclosure: What You Need to Know
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Guest article by Dr Keith Ashcroft, Independent Polygraph Examiner
Can a Polygraph Support a Complete Therapeutic Disclosure After Betrayal?
If you are reading this, you may already know what it feels like to be told “that’s everything” and then discover it wasn’t.
Each new admission reopens wounds that were beginning to close. Each reassurance becomes harder to believe. And over time, it can feel almost impossible to know when or whether you will ever truly have the full picture.
Or perhaps you are the person who has caused that harm. You want to give your partner a complete and honest account of what happened. But you understand why they may struggle to believe you, and you are looking for a way to offer something more than words.
This article is written for both of you.
This procedure may be relevant to you if…
• Your partner has disclosed past behaviour, but you remain uncertain whether you now know everything
• You have been through partial disclosures before, and each new revelation has set you back
• You are the person making the disclosure, and you genuinely want your partner to have a reason to believe that this time, it is complete
• You or your therapist are wondering whether a polygraph examination could play a useful role within a properly structured disclosure process
“Do I now know the whole story?”
If trust has been broken by infidelity, concealed pornography use, compulsive sexual behaviour or other forms of sexual secrecy, this question can become all-consuming.
Cherry Tree Therapy Centre’s article on trickle truth explains how repeated disclosures can leave a betrayed partner unsure whether they have finally obtained the full picture. Each new admission can reopen old wounds, undermine prior reassurance, and make it increasingly difficult to know when disclosure is truly complete.
For some couples, a comprehensive therapeutic disclosure prepared and shared within a structured therapeutic process can help move them out of this cycle of repeated discovery.
This raises a further question: what role, if any, can a polygraph examination play in supporting that process?
In appropriate circumstances, an independently conducted polygraph examination may provide additional structured information concerning the credibility of an agreed disclosure. But its role needs to be clearly understood; it should never replace therapy.
What does a complete therapeutic disclosure involve?
Therapeutic disclosure is much more than simply answering questions about past behaviour.
It is typically a carefully prepared process in which the person making the disclosure provides an organised account of behaviour relevant to the relationship and recovery. Both partners usually have therapeutic support throughout.
The specific areas covered will depend on your circumstances. Typically, a therapeutic disclosure might address some or all of the following, not as a confrontational interview, but as a structured account prepared with therapeutic guidance:
• sexual or romantic contact with other people.
• dating applications or secret online accounts.
• sexual messaging or online sexual activity.
• paid sexual services.
• concealed spending connected with sexual behaviour.
• breaches of previously agreed relationship or recovery boundaries.
The purpose is not necessarily to disclose every intimate or graphic detail. Excessive detail can sometimes do more harm than good.
Instead, the aim is to provide sufficient relevant information for the betrayed partner to understand the nature and extent of what happened, make well-informed decisions, and begin moving forward on a clearer factual foundation.
“I’ve been told it’s all out now” — so why does the doubt remain?
Even after a substantial disclosure, trust does not automatically return.
This is particularly true where information has emerged gradually. A betrayed partner may have been reassured before that they knew everything, only for further information to surface later. That experience makes an impression. It makes the next reassurance harder to accept—not because the person is being unreasonable, but because the pattern of partial disclosure has already repeated itself.
Understandably, this leads to a difficult question: Why should I believe that this time the disclosure is complete?
A polygraph examination may sometimes be considered within this context. Its role is not to repair the relationship or decide whether somebody should be trusted. Rather, it may provide an additional, independent source of information concerning the credibility of a clearly defined disclosure.
Many people are reluctant to explore this process, on both sides.
The betrayed partner may worry that hearing the full picture will be worse than living with the uncertainty. There may be fear about what confirmation of long-held suspicions will feel like.
The person making the disclosure may fear that nothing they say or do will be believed, regardless of the outcome. They may also feel shame, dread, or pressure, none of which are helpful if participation itself is not genuinely voluntary.
These are understandable concerns, and they are part of why careful preparation and appropriate therapeutic support matter so much before any examination is considered.
How does the polygraph fit into therapeutic disclosure?
The key principle is that the process should be issue-led rather than question-led.
Following betrayal, a partner may understandably have many questions:
• Did you meet anybody else?
• Did you use another account?
• Is there more pornography use than you disclosed?
• Did anything physical happen?
• Are you still withholding something?
These concerns are important and can help identify what needs to be addressed during the preparation of the disclosure.
However, they do not simply become a list of questions to be asked one by one during the polygraph examination.
Instead, the agreed scope of the therapeutic disclosure establishes the issue to be examined. The examiner considers what the disclosure is intended to cover, whether that issue is suitable for polygraph examination, and how the final examination questions should be formulated.
A relatively small number of carefully designed questions is generally preferable to attempting to address numerous separate suspicions.
The disclosure comes first. The polygraph examination then addresses the credibility of that disclosure within its agreed scope.
What does a polygraph examination actually involve?
A polygraph does not directly detect a lie.
The instrument records several aspects of physiological activity while the person being examined responds to carefully formulated questions. These commonly include respiratory, electrodermal, cardiovascular, and movement activity.
The examination follows a structured procedure and is preceded by a detailed pre-examination interview. During this stage, the examiner will normally:
• establish the purpose of the examination
• review the issue being examined
• discuss the relevant disclosure with the person being examined
• clarify terminology and relevant time periods
• consider suitability
• review the examination questions
• ensure that the person being examined fully understands what will be asked
There are no surprise questions during the examination.
The physiological data are subsequently evaluated using an appropriate structured method and interpreted within the context of the examination. The resulting opinion relates to a defined issue; it should not be read as a general judgement about whether somebody is an honest or dishonest person.
Why not just ask every question on the list?
This is often one of the hardest aspects of this work to explain.
Following betrayal, the need for certainty can be overwhelming. It may seem logical to assume that the more questions asked, the greater the certainty that will result.
Polygraph examinations do not work effectively in this way.
Attempting to address numerous loosely connected concerns within a single examination can make the process less focused and less useful. The examiner therefore needs to establish precisely what the examination is intended to address.
For example, a therapeutic disclosure might cover a particular period of the relationship and clearly defined categories of behaviour. The examination can then address whether relevant behaviour falling within that agreed scope has been deliberately omitted or misrepresented.
This is very different from attempting to turn every concern into a separate polygraph question.
Your concerns remain important; they help identify what needs to be covered in preparing the disclosure. But the examiner remains responsible for determining whether the resulting issue is suitable for examination and for formulating the questions used.
The therapist and the polygraph examiner have different roles.
Clear professional boundaries are particularly important in therapeutic disclosure work.
Your therapist’s role may include helping prepare for disclosure, supporting the betrayed partner, recognising relevant areas to address, managing the disclosure process and helping both people work through its emotional consequences.
The polygraph examiner’s role is different. The examiner considers whether a polygraph examination is appropriate, reviews the scope of the disclosure, determines the issue to be examined, formulates suitable examination questions, conducts the examination, evaluates the data and provides a written opinion.
The polygraph examiner should not become the couple’s therapist. Equally, the therapist should not be expected to design the technical aspects of the examination. The two processes can complement one another while remaining professionally distinct.
What can a polygraph examination actually tell you?
Realistic expectations matter.
A polygraph examination cannot:
• guarantee that every possible detail about somebody’s past has been discovered.
• prove that a relationship is now safe.
• determine whether somebody has fundamentally changed.
• tell a betrayed partner whether they should remain in the relationship.
• restore trust on its own.
What it may do is provide additional structured information regarding the credibility of an agreed disclosure.
For some couples, this can be genuinely useful, particularly where the main obstacle to moving forward is persistent uncertainty about whether important information is still being withheld.
A result that supports the disclosure does not mean that trust should be restored immediately. Renewing trust usually depends on consistent behaviour, accountability, and therapeutic work over time.
A result that raises concerns about disclosure should not automatically lead to confrontation or to an immediate decision about the relationship. It should be considered carefully within the wider therapeutic process.
The polygraph is best understood as one source of information within a wider therapeutic process, not a verdict or a final stop.
Is now the right time, or does some preparation need to happen first?
The period following the discovery of betrayal can involve intense emotions, rapidly changing information, and a strong demand for immediate answers.
For that reason, a therapeutic polygraph should not automatically be arranged immediately after discovery.
In many cases, some therapeutic preparation should take place first. The disclosure needs to have a defined scope. The person making the disclosure needs to understand what information they are expected to provide. The betrayed partner may need support in identifying which information is important for well-informed decision-making and which level of detail may be unnecessarily distressing.
There should also be a clear understanding of how the examination result will be communicated and what will happen afterwards.
A polygraph conducted during an uncontrolled cycle of accusation, confession and confrontation is very different from one incorporated into a carefully planned therapeutic disclosure process.
How do you know whether this is right for your situation?
Not every individual or relationship situation is suitable for a therapeutic polygraph examination.
Before accepting a referral, the examiner will examine factors including:
• whether participation is genuinely voluntary.
• whether there is any undue pressure or coercion.
• the current emotional and psychological state of the person being examined.
• relevant medical or medication considerations.
• whether the disclosure has a sufficiently clear scope.
• whether the issue is suitable for examination.
• whether appropriate therapeutic preparation has taken place,
• whether safeguarding or legal issues need to be addressed separately.
• how the result is likely to be communicated and used afterwards.
The purpose of the examination should be to support a properly structured process, not to threaten, punish or compel somebody to remain in a relationship. This is why suitability is considered before an examination is arranged, not as an afterthought.
Disclosure, specific-issue and maintenance examinations are different
Not every therapeutic polygraph examination has the same purpose, and it is worth appreciating the distinction.
A disclosure examination generally concerns whether an agreed disclosure is complete and accurate within its defined scope.
A specific-issue examination addresses a narrower disputed event or allegation.
A maintenance or monitoring examination may be considered later in an established recovery process to assess compliance with clearly defined behavioural boundaries over a specified period.
These are different forms of examination and should not simply be combined, as numerous questions need answering. The first task is always to establish what the issue actually is that needs to be examined.
What comes next, whatever the result shows?
The polygraph examination is not the end of the therapeutic disclosure process. Whatever the outcome, there may still be considerable emotional material for both partners to work through.
For the betrayed partner, receiving confirmation of information they had long suspected may still bring grief, anger or renewed distress, even when the outcome is in some sense a relief.
For the person making the disclosure, the process may raise difficult issues involving responsibility, shame, accountability and what genuine change looks like going forward.
Even where the disclosure is fully supported, the couple must still decide what that information means for them and their relationship.
This is why therapeutic support before and after disclosure is so important.
The objective should not simply be to obtain a particular result. The wider aim is to help move a couple from a cycle of secrecy, uncertainty and repeated discovery towards greater clarity, informed choice and, where both people want it, the possibility of rebuilding trust.
A useful adjunct — not a replacement for therapy
Used appropriately, a polygraph examination may provide additional information within a structured therapeutic disclosure process.
Used inappropriately, it can become another vehicle for repeated questioning, reassurance-seeking, or conflict.
Much depends upon how the examination is framed. A more useful starting point than “how many questions can I ask?” is to ask:
“What is the therapeutic disclosure intended to establish, and would an independent credibility assessment add something useful to that process?”
Where the therapeutic purpose is clear, the disclosure has been properly prepared, the issue is suitable for examination, and the respective professional roles remain appropriately defined, a polygraph examination may provide an additional level of information concerning the agreed disclosure.
It does not replace therapy. It does not guarantee complete truth. And it does not create trust.
But for appropriately selected couples, it may afford a clearer foundation for the therapeutic work to continue.
A few questions people often ask:
Can I bring a list of questions I want answered? Your questions and concerns are a genuinely important part of preparing the disclosure, so please do not feel they are being dismissed. The examination, however, is structured around a clearly defined issue rather than an open list of individual questions. Your examiner will explain how this works and how your concerns can be addressed within the preparation process.
Does my partner have to agree to take a polygraph? Participation must be genuinely voluntary. A polygraph conducted under coercion is neither ethically appropriate nor reliable if there is pressure; that needs to be addressed before anything else.
Will I find out things I might not want to know? This is one of the most important things to discuss with your therapist before preparing the disclosure. The aim is to give you information that helps you make well-informed decisions – not to expose unnecessary detail for its own sake. Preparation exists precisely to think this through carefully.
My partner has already disclosed once. Is it too late? No, in fact, incomplete disclosures are among the most common reasons couples consider this process. The cycle of partial disclosure is exactly what a properly structured therapeutic disclosure is designed to address.
Thinking about whether this is right for your situation?
There is no obligation to proceed. The first step is to explore whether an examination is appropriate for your circumstances.
Thinking About Therapeutic Disclosure?
If repeated discoveries, uncertainty or unanswered questions are making it difficult to move forward, a structured therapeutic disclosure process may help provide greater clarity.
At Cherry Tree Therapy Centre, we support both partners through the preparation, disclosure and follow-up process. Where appropriate, an independent polygraph assessment can also be considered as part of that work.
If you would like further information, please complete the form below and a member of our team will be in touch to discuss whether this may be the right pathway for you.
About the author
Dr Keith Ashcroft is an independent polygraph examiner who works with therapists, individuals and couples where polygraph assessment may form part of a structured therapeutic disclosure process.