Ekman's micro-expressions

Ekman's micro-expressions are brief, involuntary facial expressions that reveal a person's true emotions, often lasting just a fraction of a second. They occur when someone is trying to hide their feelings but their face flashes their genuine emotion before they regain control. These subtle cues can provide insight into what someone is truly experiencing, even if they are trying to hide it. Micro-expressions are useful in contexts like law enforcement, psychology, and negotiation, helping observers detect lie or concealed feelings by noticing these fleeting facial signals.