Polygraph testing

I am sure that there are others on this site that have had false accusations brought against them.

Although The Department of Children and Families has closed the case regarding my husband, his ex-wife is demanding that he take a lie detector test. (even though the medical examination she put her daughter through showed no evidence of abuse) His ex wife is not allowing any contact with his daughter until he does this.

We have heard such contrasting comments on this issue of the accuracy of polygraph tests, and have also heard that she can’t force him to take one.

Does anyone have any input on this. Has anyone taken a polygraph test?