A while ago, I had the pleasure of going through two CIA polygraphs. On the second one, I was accused of using countermeasures and was told that my results were inconclusive.
Now I received notice that a background investigator wants to come to my house and interview me. Does that mean that I passed my polygraph?
It would suggest that you passed, because there would be little point in a background investigator interviewing you had you not passed the polygraph. However, with any large organization, it's always possible that the left hand hasn't coordinated with the right.
That's what I thought too.
However, I was kind of confused and unsure after the polygraph since he told me that I had clearly been using countermeasures and that the results were inconclusive.
He then also asked me if I wanted to tell him anything...
Or is that something they tell often to try and get a confession?
It's quite common for a polygrapher to ask an examinee whether there is anything he wants to tell him, and yes, it is indeed a technique of fishing for admissions.