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• Why is L2 learning hard? 
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• Why might word-learning be easier than grammar?
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• What are the neurocognitive underpinnings of L2 learning and processing?
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• Do these differ for learning words and grammar?
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• Do they differ for achieving low and high proficiency?
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• Can we manipulate the biology or cognition of L2 learning to improve L2 proficiency?
Some Questions