From the first proposal of the term APD to describe these hearing deficits in the 1960s, the existence argument has raged. Some have said that auditory processing deficits are merely a manifestation of a specific learning disability or attention deficit or language disorder. Some have said that the frequent coexistence, or comorbidity, of auditory deficits with these other disorders render them merely one characteristic of a larger, more global disability. Some have even said that there is no way in which an auditory-based deficit of any type can have the kind of far-reaching implications
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