Increases in the number of users of the medical delivery system, along with an ever-increasing variety of available services, makes it desirable to identify those individuals who will benefit most from its services. With the growing reliance on third party payment, economic limitations no longer effectively restrict the use of the system's resources to those individuals who are truly ill. A framework is needed whereby individuals who are medically ill can be separated from those whose needs might be more effectively addressed by other services. A variety of means, including locus of control, has been used in the attempt to make such discriminations. In conclusion, it was observed that the low magnitude of obtained relationships presents opportunities for future research, but disallows meaningful prediction at the present time.