Update on the psychometric properties for the Italian version of the Aachen Aphasia Test (IT-AAT)

Background The Aachen Aphasia Test (AAT) is still the main test in use for evaluation of aphasic deficits German-speaking individuals (Huber et al., 1983, 1984). has also been adapted to Italian language (Luzzatti 1996) and was administered 384 people with aphasia (PWA) almost exclusively after left-hemisphere brain damage (plus 24 residual symptoms 8 without aphasia) 88 control individuals. study construct validity reliability, as well norm data, were based on those 343 PWA who passed preliminary examination applicability Token Test.Aims Motivated by current calls improving quality outcome measures aphasiology, we re-analyzed psychometric properties version AAT (IT-AAT) an enlarged participant sample, and, key analyses, more recent methods. overall sample comprised 674 89 left-brain damage, including 60 29 aphasia). investigation validity, extended data subset 598 inclusion criterion.Main Contributions Assessment differential reliability aspects corroborated earlier properties. applied performance exemplary yielded unanimous assignment a Wernicke-type at initial assessment, which evolved, speech-language therapy, impairment pattern consistent conduction aphasia, characterized disproportionately poorer subtest Repetition than Comprehension. Significant improvement could be demonstrated all subtests, remained reliable even taking into account average expected increase scores due spontaneous recovery.Conclusions normative size are suited valid application diagnostic single-case analysis procedures individual patients’ profiles their comparison detect changes over time.