Treffer: Psychometric validation of the instrument for assessment of neurodegenerative Aphasia in Indonesia or <italic>Instrumen Afasia Neurodegeneratif Indonesia</italic> (IRFANI)

BackgroundObjectiveMethodsResultsConclusionPrimary Progressive Aphasia (PPA) is a neurodegenerative syndrome characterized by gradual and selective deterioration of language. Accurate diagnosis requires comprehensive language assessments; however, culturally and linguistically appropriate tools for Bahasa Indonesia are lacking.This study aimed to evaluate the psychometric properties of the The Instrument for Assessment of Neurodegenerative Aphasia in Indonesia or <italic>Instrumen Afasia Neurodegeneratif Indonesia</italic> (IRFANI), a newly developed tool designed to assess core language domains relevant to PPA.Confirmatory Factor Analysis (CFA) using the Diagonally Weighted Least Squares (DWLS) estimator was performed to examine the instrument’s internal structure. Internal consistency was evaluated using McDonald’s omega and Cronbach’s alpha.IRFANI was administered to 300 healthy Indonesian adults (55% female) representing diverse ethnic and educational backgrounds. The analysis retained 46 valid items from the original 168, distributed across seven theoretically grounded subtests. All retained items had acceptable factor loadings (≥0.40), and CFA indicated a good model fit, supporting the instrument’s multidimensional structure. Internal consistency was acceptable (Cronbach’s α = 0.77; McDonald’s ω = 0.77), indicating that the subtests reliably measure distinct but related aspects of language function.IRFANI demonstrates strong initial internal structure and reliability in a healthy adult population. Its culturally grounded design and multidomain structure make it a promising tool for assessing language impairment in the Indonesian context. Further clinical validation among individuals with PPA is essential to establish its diagnostic accuracy and utility for subtype differentiation and disease monitoring. [ABSTRACT FROM AUTHOR]