Below are some of the terms we've found graduate students struggling to understand more frequently than others. By ordering a research paper from our site, students gain an extra edge on understanding how these various terms play roles in the mechanics of a well-researched thesis or dissertation... 
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Primary Research - original, firsthand observations reported on from the writer's own experience. Back at the undergraduate level, most research was conducted by going to a library and finding a few books and articles that reported "the facts." Those books and articles represented secondary sources. We had no real way to know for sure whether or not the authors were correct... we simply would report on their findings and cite them in our bibliographies. Primary research occurs when, at the graduate and post-graduate levels, we conduct our own experimental study and report on its results. Having gathered our own data and having made our own observations, we are inherently that much more confident in our own assertions.

Problem Statement - the underlying rationale for a study. Usually, wherever there is a hypothesis... there is also a statement of the problem. Whenever a writer sets out to test some new idea in their field, they must show cause for doing so. Why do we want to know if white classroom walls are more conducive to a good learning environment than blue classroom walls? That answer essentially lies in the dissertation's problem statement which sets up the issue in need of resolve and is then complemented by the hypothesis which ultimately proposes a way to set forth such resolution.