RT Journal Article T1 Language at home and academic performance: the case of Spain. A1 López-Agudo, Luis Alejandro A1 Gonzalez-Betancor, Sara A1 Marcenaro-Gutiérrez, Óscar David K1 Rendimiento académico K1 Estudiantes - Evaluación K1 Educación - Modelos matemáticos K1 Lenguaje y educación AB The present study analyses the influence of taking the PISA test in a language different from the one spoken at home on 15-year-old Spanish students’ academic performance. In particular, this could be the case of immigrant students and of students living in regions where a co-official language exists alongside the Spanish language. In the analysis of the influence of this divergence between test and home languages on students’ academic performance we go beyond correlation by using an instrumental variable methodology. Our results show that students who did not take the test in their home language perform worse in both reading (0.24 standard deviations) and mathematics (0.06 standard deviations). This may suggest the need to adapt the test language so that students have a sufficient level of understanding, to ensure that the measurement of their competences is not biased by their skill in the test language. PB Elsevier YR 2020 FD 2020-11-05 LK https://hdl.handle.net/10630/39337 UL https://hdl.handle.net/10630/39337 LA eng NO López-Agudo, L. A., González-Betancor, S. M., Marcenaro-Gutiérrez, O. D. (2021). “Language at home and academic performance: the case of Spain”. Economic Analysis and Policy, 69, 16-33. NO https://openpolicyfinder.jisc.ac.uk/id/publication/35764 DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 3 mar 2026