1. A method, comprising: performing a proficiency test, by a data processing system, for an input device; using the results of the proficiency test performed for the input device by the data processing system for modifying, by the data processing system, an operational characteristic of an interface of the data processing system; and evaluating a user proficiency of the input device by a background assessment of the user's activities with the input device; wherein the background assessment of the user's activities with the input device comprises: receiving at least one signal from the input device for non-accessibility enhanced target software that is unable to perform the background assessment; determining, from the at least one signal, by an adaptation module, the proficiency of the user with the input device and that an adjustment of the modification of the operational characteristic of the interface is required; wherein the adjustment of the modification of the operational characteristic of the interface comprises: adjusting at least one signal; providing the adjusted at least one signal to the non-accessibility enhanced target software; and wherein the modification of the operational characteristic of the interface is adjusted based on the background assessment.