Simulation, defined as a representational model of a particular theory, has been the subject of some research in the communication field, but there has been little material published on the uses of simulation as a research tool. Simulations are considered helpful in closing gaps between field studies and laboratory research, serving to increase coherence and consolidate theories. A simulation will be representative of the theory it serves only to the extent that it fits a well-constructed, representative model and accounts for the interaction of variables consistent with the theory. If data from a simulation do not support the hypotheses of the theory, either the hypotheses or the simulation should be adjusted according to the experimenter's goals and his degree of objectivity. The validity of simulation must be tested for specific objectives. Many simulations are more correctly identified as games or metaphorical extensions of man's social behavior. Important considerations in the use of games as simulations include control of game behavior consistent with the reference system, proper introduction of subjects to the game activity, and determination of whether or not role playing behavior best serves the game. (RN)