1. A method of forecasting subjective efficacy of a hearing prosthesis implanted in a recipient, comprising: subjecting a recipient to a plurality of temporally spaced aural tests, the aural tests evoking hearing percepts with the hearing prosthesis; obtaining first data indicative of the recipient's ability to hear with the hearing prosthesis based on performance by the recipient of the temporally spaced aural tests; and forecasting second data based on the first data, wherein the second data are indicative of the recipient's ability to hear with the hearing prosthesis at one or more temporal locations in the future.
18. The method of claim 1 , further comprising: adjusting a structural and/or functional feature of the hearing prosthesis, thereby tailoring and/or customizing the hearing prosthesis.