T.M. Cullen wrote on May 3^rd, 2008 at 7:38pm:

Question: In criminal cases, when people voluntarily agree to submit to a polygraph, are they allowed to have their attorney present? If not, why not?  People are allowed to have lawyers present during questioning, why not during a poly quiz? TC

Different organizations will have their own policy.  But, generally, if there is an observation room, I can’t think of a reason why an attorney can not be in the observation room.  But, the attorney would not be permitted in the actual room where the test is being administered.  The reason is this.  The person taking the test needs to pay attention to the examiner, not the attorney.  If the examinee is non-deceptive and has been wrongly accused or charged with a crime, the examiner is trying to successfully get that examinee through the test.  If the attorney is present in the same room, that is in itself a distraction and would not be permitted.  Agencies will have their own protocol in this regard.

My rules are this:  The attorney can be present for the test, but once the examinee is released to me for the test the attorney can not have any contact or conversation with the examinee until after the “charts” are collected.  The attorney is made aware of that before the test starts.  Any violation of that rule and the test is stopped and my report reflects the attorney interfered with the test and it could not be completed.  The examinee is free to terminate the test at any time.  If the examinee requests to speak with his lawyer during the pre or in-test phase, that request is obviously granted, but the test is stopped due to outside interference.  

Usually, what happens with my tests for defense lawyers is they will be at my office initially, speak with their client, and once the client is turned over to me, the lawyer leaves the building.  I stipulate with the attorney that if their client shows deception on the test, I will not interrogate or ask any incriminating questions, but merely send the client on their merry way.  If they are non-deceptive, I send them on their merry way.