22. The system of claim 13 , wherein: the system is further configured to identify how to change an efficacy of the prosthesis.
13. A system for managing the subjective efficacy of a hearing prosthesis, comprising: a processor; and an input/output device configured to receive input indicative of the recipient's ability to hear with the hearing prosthesis, wherein the processor is configured to develop performance data based on the received input indicative of the recipient's ability to hear with the hearing prosthesis, the processor is configured to develop hypothetical efficacy data indicative of a subjective hypothetical efficacy of the hearing prosthesis based on the developed performance data, and the processor is configured to develop hypothetical efficacy data indicative of the subjective hypothetical efficacy of the hearing prosthesis based on hypothetical temporal data.