(continued) You also wrote:
Quote:
Contrary to the statements posted on the anti-polygraph sites (I'm speaking in the plural here; it's not just this site), many countermeasure attempts are detected. Some types of countermeasures are obvious to the trained eye, others are not. Moreover, I have little idea as to what percentage are detected, for I have no idea how many people attempt them. But I can tell you with absolute certainty that the Government has detected many attempts, both obvious and subtle.
I am not aware that Mr. Scalabrini and I have ever claimed that countermeasures attempts are undetectable. But I think you blur the distinction between naive and sophisticated use of countermeasures. Some people who do not understand the assumptions based on which polygraphers infer truth vs. deception may believe that the polygraph "test" can be passed by coughing, or flexing one's arm, or wiggling one's toes, or by breathing slowly and evenly. Such manipulations might well be detected by an alert polygrapher, and are unlikely to help a person in passing. But none of the countermeasures described in
The Lie Behind the Lie Detector are obvious to the trained eye, whether that eye is observing the subject or poring over a polygraph chart, and there is no evidence in the peer-reviewed scientific literature that polygraphers can detect the use of these countermeasures at better than chance levels of accuracy.
Indeed, in a recent non-peer-reviewed report by Charles R. Honts, Susan L. Amato, and Anne K. Gordon titled "Effects of Spontaneous Countermeasures Used Against the Comparison Question Test" (
Polygraph, Vol. 30 (2001), No. 1, pp. 1-9), polygraphers were unable to identify even unsophisticated countermeasures attempts at better than chance levels:
Quote:
The present study also examined the ability of highly trained polygraph examiners to detect the use of countermeasures. The results of this study indicate that they cannot detect the use of spontaneous [i.e., untrained] countermeasures. Their ratings of the likelihood of countermeasure use were generally unreliable and were not associated with actual countermeasure use at better than chance levels. Field polygraph examiners generally appear to operate under the notion that a detection of countermeasure attempts is synonymous with attempted deception to the relevant questions of the examination... Clearly, that notion is incorrect. The results of this study show that an examiner's decision of countermeasure use is unrelated to both countermeasure use, and to deception. Our analyses indicated that almost half of the subjects judged to be using countermeasures were in fact Innocent subjects. These results strongly suggest that the field practice of equating countermeasure attempts with deception to the relevant issues of an examination should be abandoned.
In Honts et al.'s laboratory study, which involved a mock crime scenario, 89.6% of the programmed guilty subjects and 45.8% of the programmed innocent subjects reported the use of spontaneous countermeasures, that is, although they had received no training in polygraph countermeasures, they did things that they imagined would help them to pass. (We can be confident that the subjects in Honts et al.'s study had not read
The Lie Behind the Lie Detector, as the study was conducted before the 18 September 2000 release of our book.)
Honts et al.'s study suggests that unsophisticated countermeasures attempts are quite common -- even by truthful subjects -- and that polygraphers cannot detect them at better than chance levels. The countermeasures described in
The Lie Behind the Lie Detector would arguably be much harder to detect than unsophisticated countermeasures attempts, as they are quite subtle, replicate the reactions deemed by DoDPI doctrine to be significant, and those applying them will be well aware of the distinction between "control" (also known as "comparison") questions, relevant questions, and irrelevant questions and will know to augment their reactions only to the "control" questions.
Absent an admission from the subject that he/she used countermeasures, how can a polygraph examiner confirm that any of the various countermeasures described in
The Lie Behind the Lie Detector were employed? (The answer "I know, but I cannot tell you" is not convincing.)
(continued in next post)