Preparing for differentiation

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I have my differentiation/transfer next week interview next week.
I submitted about 10000 words 3 weeks ago, half lit.review, half research strategy/, methodology.
My phd's in education, looking at student teachers attitudes, so it's pretty much social science.

How did others in social sciences prepare for the differentiation/transfer? My supervisor has told me to know my lit.review and be able to justify my methdology, but any other tips would be great.

Cheers

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