Abstract: A system for measuring human perception at edges of awareness includes a message transmitter providing embedded messages embedded in supraliminal information, a sensory monitor for measuring reaction in an individual to the embedded messages, and a control system connected to the message transmitter, the control system receiving an input from the sensory monitor, the control system including a real-time feedback control loop altering a perceptability of the embedded messages with respect to the supraliminal messages as a function of the sensory monitor input.