The use of a CM will work if you enhance your breathing only at the control questions.  Make the pattern identical and this will show consistency and you will pass the test.

Amos Bill wrote on Jun 13^th, 2012 at 11:42am:

Amos, no this is not correct. Please read TLBTLD carefully then come back with some residual questions.

Is it necessary to hold breath for 4-5 sec during the CM breathing methods? How will it work?

OK. Just to make sure I am understanding correctly.

If a person only uses one of the CM breathing methods and varies the magnitude and duration of that method. Then they  don't have to use the other CM breathing methods and should not have a problem "passing" the "test" with just one CM breathing method.

Thank You

tedt3526 wrote on Oct 20^th, 2009 at 6:39am:


No, not necessarily.

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If all reactions appear identical (same magnitude, same duration), that might indeed arouse suspicion. Thus, there may be some benefit for varying the size and length of breathing countermeasures, even if the same countermeasure (e.g. breath holding) is used in each instance.

George, would you recommend using different breathing countermeasures randomly on different control questions and/or different repetition of the test? If the subject uses a single CM (such as holding breath for 4 to 5 seconds) consistently for all control questions, maybe that produces too "pretty" a chart to arouse suspicion?

tedt3526 wrote on Oct 20^th, 2009 at 3:51am:


Yes.

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I suppose that's possible. To the best of my knowledge, however, there is nothing in the polygraph literature on the detection of countermeasures through observation of such differences. 

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I am aware of no research indicating that individuals always exhibit the same breathing reactions to stimuli. However, it's possible that such a folkloric belief exists among some polygraphers.

George, are you referring to the technique of practicing even and relatively shallow breath at 15-30 per minute? I understand that if the subject can breathe evenly during relevant question so the examiner sees no reaction, that would be ideal. however what if the subject is sensitive to the relevant question and involuntarily breathe in a different pattern? in that case, the poly examiner sees that relevant question produces a smaller, but different breathing reaction than the control question, and might get suspicious? 

without conscious use of CM, is it normal for a truthful subject to have different breathing reactions to different (control) questions, or all reactions are supposed to show same pattern?

tedt3526,

The breathing countermeasures outlined in Chapter 4 of TLBTLD should result in the absence of significant reactions to the relevant questions.

The CM technique explained in TLBTLD does make sense. I have a question though. If you use breathing CM for a control question, let's say hold your breath 4 - 5 seconds. At the same time, you also have noticeable reaction to relevant question, but a different pattern, say decreased amplitude. Even though CM makes the control question reaction bigger than the relevant question reaction, but the fact is that these two reactions have different patterns. would that be a give away to the examiner? anyone has an opinion on that?