Polygraph has a role in treating addiction. When a polygrapher and a therapist work together, it can be very helpful for the parties involved. The polygraph may be used to confirm that one party is telling the truth and has not been withholding information. By using the polygraph with validating therapeutic disclosure, progress in treatment may often be made; ground truth is discovered and handled.
For example, in infidelity, polygraph examinations is a way to rebuild the trust that was lost. Sometimes the betrayed spouse can feel at ease with the truth the betrayer is telling them. Even after full disclosure of an affair to a spouse has been given, often an environment of distrust still exists. Spouses may worry that not all has been disclosed. Then polygraph is used to confirm or disprove information given by the spouse.
When treating sex addicts, polygraph may play a similar role in trying to breach deceit.
But the best solution is when these polygraphs are done in conjunction with a therapist, not totally on your own. PPoT strongly urges the use of a trained counselor / therapist when working on relationship or addiction issues.