I think they can definitely be a good tool to help deciding if reconciliation is possible or not.
If you are already determined to divorce, or state that you will divorce because it reveals a major fact I wouldn’t bother. I would just file already.
What a polygraph does is give a very strong indication on if the spouse is honest or not.
Not the truth per se – but rather if your WS is being truthful as they see the truth.
If your WS really thinks 2+2=5, then they would pass with a "no" if asked "is 2+2=4". We know the true answer is four, but the HONEST answer from the mathematically challenged WS is "true"/honest.
This is why ideally an operator wants a question they know the answer to, without the WS knowing they do. It gives a very clear baseline.
A base for any shot at reconciliation is that the BS knows what they are reconciling from. The WS needs to fully understand this. Learning about a kiss in the past a year from now can do more damage than learning about sex now. At some point the BS commits to reconciliation in the belief that everything is on the table, and that the "problem" has been quantified and defined, only to have something added at a later date. It’s trickle-truth that tends to do more damage than honest-truth.
The first thing out the window at d-day is trust. For the next months or even years the WS needs to contribute the trust needed for the relationship. We – the BS – need to realize that a relationship without trust isn’t sustainable, so part of our recovery is the recreation of trust (trust but verify). At some point down the road, we need to feel safe.
When we tell the WS that we are open to reconcile but we need the absolute truth we also need to get the message across that this isn’t negotiable, and that telling us the truth indicates they trust us with the process. At the same time – lying indicates they don’t trust us and with two partners with limited-to-none trust reconciliation simply isn’t possible.
Therefore – the purpose of a poly should be clear to both – it’s the point where the WS can confirm they have been HONEST in their truth. That they are candidates for reconciliation. It should also give US the BS a baseline to move on from. We need to accept the result and act accordingly.
Like if a WS story consistently says there were 2 affairs, and the poly confirms that then we don’t sink into the pit of searching for the third. We move on with the knowledge that there were two, and that’s bad enough already.
The biggest issue I have with polys is when they are used too early and/or the BS hasn’t decided what the results will lead to.
Right now, we have a thread on this forum where a BS used a poly to confirm the extent of the WS affair (kissing as WS claimed or sex). The WS has stuck to the story and passed a poly on that issue. Yet the BS still agonizes about if it was a kiss or full sex. IMHO this poly was a waste of time.
I also remember a poster whose wife spent a lot of time with her boss, including afternoons and evenings in his hotel-room (to get peace from the busy office up the road…), beauty treatments before these "work-sessions", dressing up for dinner at these sessions, hiding the phone, hiding lingerie, close contact with boss in public, suggestive texts… Basically everything except a visual of them together in bed. His wife refused everything and failed TWO polygraphs on the questions based on having a sexual relationship with boss. Yet the poster had enough doubts about the polys and his evidence that he remained in the marriage, only to fade away from this site when he realized the misery we forecast was becoming his reality.
To conclude: A poly is IMHO a very useful tool if you want a shot at reconciling. What it does is tell you if your spouse is a candidate or not. The message has to be gotten across that you need the absolute truth, and a poly is a great way for the WS to indicate you have it. That they trust you, that they have been honest in their truth and that they want to move forwards with you.
What it does for us however – to be useful for the marriage – is draw a line under our doubts. Of course, we are allowed (and should have) doubts, but like the guy above who has no evidence other than his doubts about the kiss or sex, the doubts need to be logical rather than purely emotional.
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Finally – about polys.
They are admissible in court in some states and countries but under such conditions that both the prosecution and the defense can refuse them. Nobody can be forced into a poly.
If I was a prosecutor and had enough evidence to go to court, I wouldn’t want to risk my DNA-samples, timelines, fingerprints, witnesses… by allowing the accused to pass a poly, therefore refusing its usage. At the same time if I was the defending attorney and the prosecution asked for a poly (one I can emphasize the unreliability of) I would be thinking the prosecution is desperate.
Falsifying results? Have heard all these stories about having a tic in your shoe, using sedatives or controlling your breathing. Probably all work, once you have tried them several times with an operator where you train to pass a poly. If your WS has the sense, time and resources to go find a polygraph operator willing to coach them into passing a test… the infidelity isn’t your biggest problem!
The above defender? If the prosecution requested a poly, I would consider training my client to pass.
And yes – the operators know all the tricks and monitor for them.
Reliability? I honestly don’t know of a big enough test to answer that.
Imagine a university doing a test on polys. The advertise for 1000 people to test. What life-altering question can they ask? "Is this apple blue?" answered with a "yes" is just funny, lying that the red apple is blue won’t change your life. Now replace the apple with a nervous spouse that knows the future of their marriage is based on the next 20 minutes…
Plus, it measures honesty rather than lies. Of course, infidelity isn’t honest, but people that are generally honest can do dishonest things. But we also have people that don’t really discern between honest and dishonest. People that can lie just because that’s what they do. We have enough narcissists and psychotics that can pass any test that measures honesty simply because they don’t have it.