134 CHAPTER 8 Cognitive psychologists have demonstrated that repeatedpractice in spaced sequences is bene cial for strengthening the memory representation of a word or a prefabricated sequence (cf. Pavlik & Anderson, 2005) and that these linguistic items or sequences are better recalled if the repetition is spaced: when the exposure to and the use of these items and sequences occur with time lapses in between, the learning process was found to be more e ective (for an excellent overview of relevant literature, see Serrano, 2012). By nature, a DUB approach with built in repetition of sequences over several weeks is favorable to spaced learning and will lead to a high degree of automatization, while an SB approach usually has thematically and grammatically organized chapters and repetition of language sequences is not really built in. Input repetition in coursebooks is thus too limited to facilitate the process of automatization.
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