From the other side of the consultation, briefly. There is a difference between no evidence and evidence of no effect, and this subject is one where the two get swapped freely in both directions.

labquiet_amy said:

If you are going to change something, change one thing and give it long enough to express itself.

Coming at labquiet_amy’s question from a different direction. If two explanations both fit, the useful question is which one predicts something the other does not. That is answerable; arguing about which sounds more plausible is not.

Adding the numbers, since they settle part of this. One habit that pays for itself: post the method alongside the number. A figure without its method cannot be checked, and an unchecked figure is how this community accumulates folklore.

I would rather be corrected than agreed with, if it comes to it.

A narrower follow-up, since the general answer is now clear:

What did you change at the same time, and can you separate the two now?

Moderator note: two posts asking for a source have been merged into one. Please search the thread before asking again. Report rather than reply if it drifts again.