Apart from those factors that influence the acquisition of a foreign language in general (namely the role of the language environment, the role of input, the role of the first language and internal processing – for more information, cf. Eddy, 2011), there is a set of such influences that vary from one learner to another and differ according to a learner’s inner characteristics. Authors within the field distinguish various factors which, as they believe, influence second or foreign language acquisition. Among these, individual learner characteristics play a central role.