subcategories based on sensitized measures of auditory dysfunction and on psychological assessment, patients can be subdivided into seven subcategories: middle ear dysfunction mild cochlear pathology central/medial olivocochlear efferent system (mocs) auditory dysfunction purely psychological problems multiple auditory pathologies combined auditory dysfunction and psychological problems unknown different subgroups may represent different pathogenic and aetiological factors. thus, subcategorization provides further understanding of the basis of auditory processing disorder, and hence may guide the rehabilitative management of these patients. this was suggested by professor dafydd stephens and f zhao at the welsh hearing institute, cardiff university. treatment