Mr. Ruby. Oh, running a nightclub you get involved in various altercations.
Mr. Herndon. Now, this next component that I want you to see will be what we call the Galvanic Skin Response, GSR. I’m going to place these on your fingers, and actually all this simply does, through these instruments and the electronic processes, is to record any variance in the electrical conductivity or the resistance of your skin. It’s helpful to me in this examination. Your hands are very good. They are not sweating a bit. Is that too tight?
Mr. Ruby. No.
Mr. Herndon. Is it uncomfortable?
Mr. Ruby. No.
Mr. Herndon. All right, Mr. Ruby. Now, neither one of these two components will you feel at all. That will be no problem at all.
Mr. Ruby. All right.
Mr. Herndon. Now, the next component that I will put on your left arm, because it’s closer to your heart, and this is the cardiograph cuff, and this is going to give me an accurate tracing of any relative changes in your blood pressure. These will just be relative changes. I won’t be able to necessarily know what your blood pressure is. I will have relative blood pressure changes, and I will also have on a chart a change in any heartbeat or heart rate you might have.
Now, I am going to record all these physiological responses as we discuss the questions, and as you answer them I will have an indication of what is taking place physiologically, what is going on in your physical system, and which will assist me in interpreting whether or not you may be deceiving with regard to the question.
Mr. Ruby. What is your name, please, sir?