LabKate said:

The boring version of this is the one that works, and the boring version is: measure a baseline, change one variable, wait, measure again under the…

Pushing back on LabKate here. I would resist the confidence. Half of what this board was certain about two years ago has since been quietly dropped, and nobody went back to correct the threads.

Ask again with the specifics and you will get a better answer than this one.

LabKate said:

The boring version of this is the one that works, and the boring version is: measure a baseline, change one variable, wait, measure again under the…

That is right for the common case. Whether it is right for the case being asked about depends on a detail that has not been given.

LabKate said:

The boring version of this is the one that works, and the boring version is: measure a baseline, change one variable, wait, measure again under the…

Saving this. It is the first explanation that did not require me to already understand it. I will report back once I have actually tried it.

Adding the clinical framing, because it changes how the question reads. It is worth asking what the claim would look like if it were false. If nothing would look different, it is not a claim about the world and no amount of discussion will settle it.

newstart_MO said:

It is worth asking what the claim would look like if it were false.

Adding a me-too, because a thread of one person's experience is not much use. Posting only so the count is not one.