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Effects of Graded Texts on EFL College Students' Incidental ...

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acquisiti<strong>on</strong>, how much exposure <str<strong>on</strong>g>of</str<strong>on</strong>g> words do learners have to encounter for successful<br />

word acquisiti<strong>on</strong>?<br />

3a. How much exposure <str<strong>on</strong>g>of</str<strong>on</strong>g> word are required to lead to learners’ receptive word<br />

knowledge?<br />

3b. How much exposure <str<strong>on</strong>g>of</str<strong>on</strong>g> word are required to lead to learners’ productive word<br />

knowledge?<br />

The answer c<strong>on</strong>cerning the amount <str<strong>on</strong>g>of</str<strong>on</strong>g> exposure necessary for successful<br />

receptive and productive word knowledge is inc<strong>on</strong>clusive. Learners were not able to<br />

recall correct translati<strong>on</strong>s even for words which had appeared up to 15 times. It<br />

could <strong>on</strong>ly be assumed that an amount <str<strong>on</strong>g>of</str<strong>on</strong>g> exposure <str<strong>on</strong>g>of</str<strong>on</strong>g> at least 15 times is required for<br />

word acquisiti<strong>on</strong> within extensive reading c<strong>on</strong>texts. Inferenceability in authentic<br />

materials, learners’ shallow depth <str<strong>on</strong>g>of</str<strong>on</strong>g> processing, difficulty <str<strong>on</strong>g>of</str<strong>on</strong>g> target words, and<br />

individual differences were reas<strong>on</strong>ed as factors for such results.<br />

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