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High inter-rater reproducibility of the ART tested in 91 aphasic patients. a ART scores rated on the same day by two independent examiners (Raters 1 and 2) showing a coefficient of concordance of 0.990 and a weighted kappa value of 0.934. b Bland–Altman plot showing that ART reproducibility is stable across all degrees of aphasia severity, with no test–retest effect. Note that a difference of >2 points indicates a significant change in aphasia severity
