Most of us are acquainted with the old riddle that goes: "If a tree falls in the forest, and no one is in the area to hear it, does it make a noise?" From a communication point of view, the answer must be a definite "No." Even though there are sound waves, there is no sound because no one perceives it. For communication to take place, there must be both a sender and a receiver. This guide is focused on the receiver - the one who provides feedback...