1. A method, comprising: modifying, by a data processing system, an operational characteristic of an interface of the data processing system; and evaluating a user proficiency of an input device by a background assessment of a user's activities with the input device; wherein the background assessment of the user's activities with the input device comprises: determining, from at least one signal from the input device, 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 the at least one signal; and providing the adjusted at least one signal to non-accessibility enhanced target software.