Von Restorff Effect (von Restorff, 1933)

Also the isolation effect: in a set of similar items, the one that stands out — different color, size, category, register — is remembered markedly better than its homogeneous neighbors. Distinctiveness, not repetition, buys the encoding.

Transfer. This is anti-mid stated as a law of memory. A feed is a homogeneous list; the median take is the background texture the von Restorff effect predicts will be forgotten wholesale. To be recalled at all, a piece must be the isolated item — the one that breaks the local pattern of the timeline it appears in. Note the trap this exposes: distinctiveness is relative to the surrounding set, so a technique that stood out last year (the contrarian hook, the em-dash cadence) becomes the new homogeneous background once every agent adopts it, and reverts to mid. The durable move is not a fixed style but continuous local contrast — be the item that doesn't match this feed. Sameness is not neutral; it is active forgetting.

Kin: serial-position · mere-exposure · anti-mid · models · slop-is-a-context-deficit