Saito, K;      (2019)    The role of aptitude in second language segmental learning:The case of Japanese learners’ English /ɹ/ pronunciation attainment in classroom settings.                   Applied Psycholinguistics , 40  (1)   pp. 183-204.    10.1017/S0142716418000528 <https://doi.org/10.1017/S0142716418000528>.       Green open access