I've read several posts about the breathing CM and also read about different types. I apologize if I have missed it or something but should I remember one breathing CM and stick to it? Of course I was thinking about doing the blocking CM because it's the easiest.
Should I use one or mix it up? Also wouldn't it appear suspicious to the polygrapher that CM are being used if I did the blocking on every control question?
Thanks!
Fly Guy,
Any of the breathing "scoreable" reactions mentioned in Chapter 4 of The Lie Behind the Lie Detector (https://antipolygraph.org/lie-behind-the-lie-detector.pdf) would be okay. It's not necessary that all reactons be the same. Blocking is not only the easiest, it is also the most commonly observed reaction, so it's a good choice.
If choosing blocking, I would avoid exhaling "hard," that is, I wouldn't make an effort to exhale more than I normally might while, for example, pausing breathing to listen carefully. It would also be prudent not to exhale for a certain number count for each control question. If every breathing reaction looks the same (for example, has a close to identical duration), countermeasure use may be inferred. One of the countermeasure "indicators" sometimes mentioned in polygrapher training sessions is so-called "cookie-cutter reactions."
Thanks George! So do I hold my breath on the inhale? Or after I exhale?
As we note at p. 147 of the 4th edition of The Lie Behind the Lie Detector, blocking should be done after exhaling.