Hand gestures are commonly used in speech to paint pictures. It is believed that a lying person touches or rubs his or her face quite often. Other pointers to check on are changes in hand gesture frequencies, speed, and duration. Again these are delay tactics to allow one to fabricate an answer. Just like the previously stated cautions, this is not a clear indicator of deception.
This brings an end to the microexpressions section. The most important thing to stress is that microexpressions are not a science and are not always accurate. They can only give pointers that can be followed upon by further interrogations and observations. Microexpressions can help you to mitigate a social engineering attack at an early stage. The section ...
