Executing Facial Control During Deception Situations

Behavioral countermeasures are the strategies engaged by liars to deliberately control face or body behavior to fool lie catchers. To date research has not shown whether deceivers can suppress elements of their facial expression as a behavioral countermeasure. This study examined whether participants could suppress facial actions such as eyebrow movements or smiles on command when under scrutiny by a lie catcher. The results derived from micro momentary coding revealed that facial actions can be reduced, but not eliminated, and that instructions to suppress one element of the expression resulted in reduction in all facial movement, regardless of veracity. The resulting implications for security contexts are discussed.