Notice their microexpressionsMicroexpressions are very brief, involuntary expressions that often reveal a person's real emotions. They usually last for only a fraction of a second and hence can be missed. However, noticing one's microexpressions can help you know their genuine feelings and intentions. Source link
How to know if someone is lying, as per psychology
Notice their microexpressions
Microexpressions are very brief, involuntary expressions that often reveal a person’s real emotions. They usually last for only a fraction of a second and hence can be missed. However, noticing one’s microexpressions can help you know their genuine feelings and intentions.
