Methods
The One-Change-at-a-Time Trap
The one-change-at-a-time method can hide interactions. Learn how to choose useful comparisons and keep conclusions…
sections
Methods
Use clear steps and fair comparisons to learn from a small test.
Our point of view
A small test can open a bigger question
We value experiments that begin within reach: a clear question, materials already at hand, and enough attention to learn from the result.