This is the case for APD because the tests used to diagnose the disorder are not only measures the auditory abilities. One cannot assume, then, that poor performance on an APD test battery is caused by poor auditory abilities rather than some non-auditory factor. This finding suggests that it is more appropriate to view difficulties on the SCAN-C as a problem with verbal working memory than with auditory processing. The same could probably be said for other tests that are commonly used to diagnose APD. (Kamhia, 2011, p. 267)
Simply put, they have put in too much energy, and resources trying to understand and treat a disorder that has not only defied definition, but lacks clear diagnostic criteria. Even if there were a consensus about the definition of APD and the specific diagnostic criteria that characterize the disorder, there is no compelling evidence that auditory deficits are a significant risk factor for language or academic performance. (Kamhia, 2011, p.