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UX Atlas
TermCraft conventionFoundational

Effect Size

How big the difference actually is.

Definition

The magnitude of a difference, independent of sample size.

Craft convention. True because the industry converged on it. Breaking it costs familiarity, not correctness.

In plain language

How big the difference actually is.

Example

Significance says the effect is real. Effect size says whether it matters. Report both.

Each link says what the connection is, so you can tell a principle from an alternative from a thing people mix this up with.

Deeper reading

The full entry behind this definition.

Related concept

Connected closely enough to change how you apply this.

Nearby in the Atlas

Adjacent territory, found through shared tags rather than a stated link.