The complexity of the role of motivation in second language acquisition processes, along with the different motivational types that have been identified, have long been the object of much learner-centred research which has led to a wealth of practical implications for foreign language teaching contexts and the development of learner autonomy. This article will present results from a longitudinal study addressing the nature of motivation in first year university EFL learners and the effect of integrated strategy training as a means to foster greater autonomy, and, in consequence, raise intrinsic motivational levels.La complejidad del papel que desempeña la motivación en el proceso de adquisición de segundas lenguas ha sido objeto de e...