Hello, I was wondering if there is a difference between direct lie and probable lie polygraph. The reason I ask is to see if the new polygraph by CBP has different standards for passing.
Thank you.
Joanna,
The differences between probable-lie and directed-lie CQT polygraphy are explained in Chapter 3 of The Lie Behind the Lie Detector (https://antipolygraph.org/lie-behind-the-lie-detector.pdf).
The specific directed-lie technique recently adopted by CBP is called the "Test for Espionage, Sabotage, and Corruption" or "TES-C." For documentation and discussion of this technique, see the blog post, "U.S. Customs and Border Protection Polygraph "Test for Espionage, Sabotage, and Corruption" Exposed." (https://antipolygraph.org/blog/2018/06/22/u-s-customs-and-border-protection-polygraph-test-for-espionage-sabotage-and-corruption-exposed/)
Note that the scoring of probable- and directed-lie polygraph "tests" is similar in that the key to passing is to exhibit stronger reactions to the "control" or "comparison" questions than to the relevant questions.