I had to take a poly because I am on probation and the only question on the poly that I "reacted" to was the one asking me if I had taken any illegal drugs.  I was told I had an electro-dermal response, but my breathing and blood pressure were ok.  I actually looked at the chart.  How do electral dermal responses work?  I really was telling the truth on all the questions so I think it's funny that I scored an "inconclusive" on that one, let alone any, but it's funnier because I've NEVER done any illegal drugs.  So now I may have to write a paper on WHY I may have responsed to that question.  I honestly don't recall thinking anything except listening to the questions and answering like we had gone over so many times before.  Maybe if I better understood electrodermal responses, I may be able to track down why I had one?