What you'd probably say, and the word that makes the point precisely. This is the subject that governs all the others \u2014 it's how you tell a finding from a claim, and a claim from a press release.
Different questions need different designs, and a design can only support certain kinds of conclusion. Naming the design tells you in advance what the study can and cannot prove.
The working vocabulary. Two groups here matter more than the rest: the threats to truth, and the checklist for reading someone else's work.
Papers are written in a dense shorthand nobody explains. Here's how to read the numbers in an abstract without a statistics course.