"EXCLUSIVE: TSA’S SECRET BEHAVIOR CHECKLIST TO SPOT TERRORISTS"

"Since its introduction in 2007, the SPOT program has attracted controversy for the lack of science supporting it. In 2013, the Government Accountability Office found that there was no evidence to back up the idea that “behavioral indicators … can be used to identify persons who may pose a risk to aviation security.” After analyzing hundreds of scientific studies, the GAO concluded that “the human ability to accurately identify deceptive behavior based on behavioral indicators is the same as or slightly better than chance.”

The inspector general of the Department of Homeland Security found in 2013 that TSA had failed to evaluate SPOT, and “cannot ensure that passengers at United States airports are screened objectively, show that the program is cost-effective, or reasonably justify the program’s expansion.”"
https://firstlook.org/theintercept/2015/03/27/revealed-tsas-closely-held-behavior-checklist-spot-terrorists/