The Moroccan Arabic Bedside Western Aphasia Battery–Revised: Linguistic and Psychometric Properties.

Purpose: The objectives of this study were (a) to linguistically and culturally adapt the English bedside version of the Western Aphasia Battery–Revised (Bedside WAB-R) into Moroccan Arabic (MA) and (b) to assess its psychometric properties. Method: The Bedside MA-WAB-R was piloted on a population of 20 partici- pants after a process of linguistic adaptation from English to MA. To verify the psychometric properties of the test, a group of healthy controls (n = 106) and a group of persons with chronic aphasia (n = 52) completed the Bedside MA- WAB-R. The test’s content validity, construct validity, and the concurrent valid- ity of the aphasia classification system were examined. In addition, the interrater reliability, intrarater reliability, test–retest reliability, and internal consistency of the instrument were evaluated. Results: The results indicated that the Bedside MA-WAB-R overall met stan- dard criteria for excellent psychometric properties, as evinced by high content and construct validity and concurrent validity with independent measures of aphasia diagnosis (speech-language pathologists’ impression and lesion loca- tion) as well as high internal consistency, inter- and intrarater reliability, and test–retest reliability. The test was also found to have very high sensitivity and specificity for the detection of aphasia, as revealed by the performance of con- trols. By controlling for age and educational level effects, specific cutoff values were determined to optimize the aphasia diagnosis. Conclusions: The Bedside MA-WAB-R is the first standardized quick aphasia assessment tool with associated psychometric properties for clinical use with an MA-speaking population, particularly within the 26- to 58-year age range. It meets standard criteria for a valid and reliable measure than can have a variety of clinical and research applications. [ABSTRACT FROM AUTHOR]