Psychology

Isolation effect

The thing that stands out from everything around it is the one we notice and remember, which is why the odd one out wins attention.

1891–2025Updated 26 October 2026

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Isolation effect: where it comes from

Hedwig von Restorff found that when one item in a list differs from all the others, people remember it far better (von Restorff, 1933). Psychologists call it the isolation effect, or the von Restorff effect.

In ads it shows up as the stunt nobody expected, the quiet ad in a loud category and the image that looks like nothing else around it.