Resumen de Developing and validating a questionnaire on prospective foreign language teachers’ beliefs about multilingualism

María Isabel Morera Bañas, Ignacio Fernández Portero

• The main objective of this study was to develop and validate a reliable instrument to analyse the beliefs about multilingualism of prospective foreign language teachers at the University of Extremadura (UEX). The ad hoc questionnaire was designed based on existing literature, resulting in a 30-item scale distributed across four dimensions. The study followed a mixed-method design, including expert validation, a pilot study, and exploratory and confirmatory factor analyses. The final version demonstrated strong psychometric properties (Cronbach’s alpha = 0.93) and a clear four-factor structure, indicating that the instrument is both valid and reliable for assessing beliefs about multilingualism in this population.