Normative data for the standardisation of an acute aphasia screening tool: influence of age, gender and educational level
Cardiff Metropolitan University
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Background: Following the development of a new aphasia screening tool, the ABUHB CST, it is necessary to standardise it in order to be clinically useful. Administering the screen to a normative population can assist with the establishment of a number of the screens psychometric properties. Furthermore, demographic variables have shown to influence performance on language tests and should be taken into account when considering normative performance. Aims: This study aims to create a normative database to be used in future research establishing the screens psychometric properties. Additionally, an objective was to analyse the influence of age, gender and education on performance and gather relevant information to further develop the screen. Methods & Procedures: The ABUHB CST was administered to 50 participants, considered to be healthy normal individuals. These participants were divided into groups depending on their age, gender and level of education. Analysis was carried out using descriptive statistics, ANOVAs and a MANOVA, establishing an overview of normative performance on the screen and determining the influence of demographic variables. Outcomes & Results: Results showed variation in performance across the screen, 28/50 participants made at least one error. In addition, each subsection was analysed to identify any consistently difficult test items in order for them to be reviewed. While there seemed to be a slight trend between gender and education, only age appeared to significantly influence performance (p=0.04). Conclusions: This study has successfully obtained a normative database which can be referred to during future standardisation of the ABUHB CST. This data will be particularly useful when establishing validity and cut-off scores for the identification of aphasia post-stroke.
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