Direct instruction can help in a number of ways. It can lead to enhanced accuracy, it can help learners progress through developmental stages more rapidly, and it can destabilize interlanguage grammars that have fossilized. However, direct instruction is not always successful nor are its effects always durable. Constraining factors are the nature of the target structure and the learner’s stage of development. Less is currently known about what type of direct instruction works best. Input-based instruction may prove as effective as productionbased instruction and, perhaps, even more so. Input-flooding may help students learn features in the input but does not destabilize interlanguage grammars (i.e. it does not get rid of established errors). For this, explicit instruction and negative feedback may be needed. It is also very likely that the effectiveness of different types of instruction will depend on the abilities and predispositions of individual learners. An alternative to direct instruction is strategy training. However, uncertainty exists regarding the content, methodology, and outcomes of such training.
Source: ELLIS, R. Second Language Acquisition. Oxford: Oxford University Press, 1997, p. 87-88.
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