This is based on neurolinguistic programming (NLP), which is largely considered to be a pseudoscience. That being said, it does work some of the time, with some people. It is not reliable though. As for detecting lies, the most effective tool is most likely instinct/gut feeling. This is frequently based on microexpressions which we pick up on with out realizing what is making us suspicious. Look at Paul Eckman's research if you really want to dig into it.
Paul Ekman's work is not exactly undisputed, especially because he does not present his findings to peer review, which might have to do with him commercially exploiting his findings on a rather high scale, and also probably because he is trying to objectify his gut feelings rather than exploring them scientifically.
I agree he has commercialized his work, not necessarily a bad thing. However, I question your assertion regarding peer review. e.g. Ekman, P. (2003). Darwin, deception, and facial expression. Annals of the New York Academy of Sciences, 1000(1), 205-221. Ekman, P., & O'Sullivan, M. (2006). From flawed selfâassessment to blatant whoppers: the utility of voluntary and involuntary behavior in detecting deception. Behavioral sciences & the law, 24(5), 673-686. (To name a couple) In addition, he is one of the foremost experts on emotion.
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