Are you actually measuring what you claim to measure? (e.g., Using a scale to measure weight, not height).
If someone else followed your exact "recipe," would they get the same result? Documentation is key here. 3. Sampling Strategy Principles of Research Methodology: A Guide for...
Think of these as the "Truth" and "Consistency" of your work. Are you actually measuring what you claim to measure
Start by writing a clear, one-sentence problem statement. Everything else in your methodology should serve that single sentence. Using a scale to measure weight
If you want to know how many people feel a certain way, use methods (surveys, stats).
Randomly selecting participants so everyone has a fair shot (best for generalizing results).