Good historical research begins with a clear research question, not a vague topic. The question shapes which sources you seek, how you interpret them, and what counts as evidence. Research design involves identifying what you need to know, where you're likely to find it, potential obstacles, and how you'll handle contradictory evidence.
You have already learned to classify sources as primary, secondary, or tertiary and to think about causal explanation in history. Research design is where those skills get organized into a systematic plan. The difference between a student who "researches the French Revolution" and a historian who "investigates whether economic grievances in the Parisian artisan class were more important than political ideology in motivating popular participation in 1789" is not a difference in subject matter — it is a difference in question structure. The specific question defines the project: it tells you which sources are relevant, what you need to compare, and what a satisfying answer looks like.
A good research question has several properties. It is answerable — there exists, at least in principle, evidence that could bear on it. It is falsifiable — you should be able to imagine what evidence would lead you to conclude the opposite. It is significant — a yes or no answer would matter for how we understand something historically. And it is appropriately scoped — it can be addressed within the practical constraints of the project. "Why did Rome fall?" is a topic; "Did the debasement of the third-century currency contribute to provincial loyalty collapse in the Danubian frontier by creating conditions of military pay crisis?" is closer to a question (though still very large). Learning to distinguish the two, and to sharpen vague topics into genuine questions, is the core design skill.
Source planning follows from the question. Different questions require different source types: a question about elite decision-making may be addressed through state documents and correspondence; a question about popular experience may require parish records, legal depositions, and material culture. Your source classification skills are now inputs to a strategic problem: given my question, what would I need to find, in what archives or repositories, subject to what access constraints? This planning stage also requires honest gap analysis — what sources would ideally exist but don't? Which questions are currently unanswerable because the evidence is lost or inaccessible? Acknowledging these limits is not a weakness; it is what separates rigorous scholarship from confident assertion.
The most important design decision is how you will handle contradictory evidence. You will always find sources that point in different directions. The naive approach is to report only what confirms your initial hypothesis; the more sophisticated approach is to design your project from the beginning to test the question rather than prove an answer. When evidence conflicts, you have several tools: evaluate the reliability of each source independently, look for patterns in who is generating conflicting accounts and why, distinguish between genuine disagreement about facts and disagreement about interpretation, and be willing to revise your question in light of what you find. Good research design is not a rigid plan executed mechanically — it is a framework flexible enough to accommodate surprise while disciplined enough to keep you from simply writing the story you wanted to write before you looked at the evidence.
Topics in reflective domains aren't scored by quiz answers. Read, reflect, and mark when you've thought it through.