Experiments, testing & rollout · Working
Effect size
Also called: treatment effect
ELI5
How large the change actually is.
Used in conversation
“The effect size is too small to justify the complexity.”
Definition
The magnitude of a difference or relationship, independent of sample size.
Here “Effect size” means: The magnitude of a difference or relationship, independent of sample size.
Pitch context
You will see “Effect size” in product strategy decks, roadmaps, experiments and architecture reviews when the discussion reaches experiments, testing & rollout.
Why it matters: It helps a reader interpret experiments, testing & rollout without confusing the measure, decision, role or evidence being discussed.
Sources & evidence · 2
Supporting source families. This entry is an editorial synthesis rather than a quotation from one canonical glossary.
- Scrum Guides — The Scrum Guide — official current versionSupporting source family · primary · checked 2026-08-16
- National Institute of Standards and Technology — Computer Security Resource Center GlossarySupporting source family · primary · checked 2026-08-16