This idea first of all was put forward by Paul Ekman and William Friesen who suggested that if a person is lying, then the maximum kinetic signals are received from the legs and feet; in comparison to other body parts which are in the upper portion of the body.
இந்த யோசனையை முதலில் பால் எக்மன் மற்றும் வில்லியம் ஃப்ரைசென் ஆகியோர் முன்வைத்தனர்.