Quote From Tudor_Queen:
Yes, it needs an overall intro and a discussion (and will have the papers in the middle).
When I say I am copying it in, I mean I copy it in and then change it - it is the same facts just hashed up in a different way (it definitely would not be plagiarism - I am changing things enough for that). I see no other way to justify each study. The intros do differ a lot more as they get down to the final paragraphs and describing the present study and the nitty gritty - but several sections are always the same story - it is the same overarching ideas that make the rationale for the 3 studies. :/
Be careful about repetition in a thesis. A colleague of mine did that and it risks seriously pissing off your examiner as it did in that case.