Learn · Qualitative methods
If these three words never felt intuitive, you are not alone. The concepts are simple. The labels are not. Here is each one in plain terms, with an example, and why mixing them up weakens your argument.
After this guide you will be able to:
| Reasoning | In plain terms | Example | Use it to |
|---|---|---|---|
| Deductive | Top-down. Start with a theory, then test it. If the premises hold, the conclusion follows. | Theory: social support lowers stress. Study: do people with high support score lower on stress? | test or confirm an existing theory |
| Inductive | Bottom-up. Gather observations, find patterns, build a theory. The conclusion is probable, not certain. | Interviews produce categories, then themes, then a theory of the phenomenon. | build theory when little is known |
| Abductive | Best explanation. Move between theory and data, adjusting as you go. Plausible, not watertight. | A doctor reads the symptoms, infers the most likely cause, then tests it. | explain a surprising pattern |
Abduction sits between the other two. It is sometimes miscalled "adductive". You may start from established concepts, but you have to be willing to adjust them, or invent new ones, when the data push back. That back-and-forth is what bridges theory and emergent insight, and it is also why abductive conclusions stay tentative until other evidence backs them up.
Deduction tests, induction builds, abduction explains. Use one word while you are really doing another, and the logic of your argument blurs. That is how a paper ends up making claims its design cannot support. For example, do not reach for an inductive term like "code saturation" when your analysis is reflexive thematic analysis. The word has to belong to the method.
If the words were the hard part, that is normal. The reasoning here is something you already do. A detective, a doctor, a mechanic all move between theory and evidence every day. The difficulty is almost never the idea. It is that the labels are unintuitive and rarely explained. Once the word is yours, the logic snaps into place.
Keep the reasoning and the words aligned.
You called your study "inductive", and a reviewer pointed out you actually started from an existing framework. That is not carelessness. These terms overlap in practice and travel loosely between traditions, so almost everyone conflates them at some point. The fix is to name the reasoning you actually used, and keep your methods section consistent with it from protocol to write-up. MethodVahti checks that your stated method, your terminology, and your written claims line up. It flags the mismatch. It does not decide which reasoning fits your question. That stays yours.
See MethodVahtiSee also code vs meaning saturation and the three questions that make qualitative research rigorous. More guides are on the Learn page.