Behavioral surveillance

Definition
Behavioral surveillance

"seeks to detect physiological behaviors, conditions, or responses and the attendant biological activity that indicate that an individual is about to commit an act of terrorism. Specifically, behavioral surveillance seeks to detect patterns of behavior thought to be precursors or correlates of wrongdoing (e.g., deception, expressing hostile emotions) or that are anomalous in certain situations (e.g., identifying a person who shows much greater fidgeting and much more facial reddening than others in a security line)."