Why you remember the exception and forget the rule

A manager can describe in detail the one candidate who arrived in a bright yellow jacket and cannot describe the eleven who wore navy. The navy candidates were the data. The yellow jacket was the anomaly, and the anomaly is what got written down, in a system nobody asked to prioritise it that way.

What everyone sees

The imbalance is read as bias in the ordinary sense, a personal quirk to be corrected by trying harder to remember the typical. The pattern is not a quirk. It follows from how items compete for encoding, and instructing yourself to attend to the mundane does not restore it, because the mundane is being suppressed by its own repetition.

What is actually happening

Von Restorff showed that an item differing from its list neighbours is recalled far better than any of them, an effect reproduced across a century of variations in material and modality. Hunt’s treatment of distinctiveness argues that the advantage comes from the relation between item and context rather than from any property of the item: the same word is memorable in a list of numbers and forgettable in a list of words, so distinctiveness is a contrast, not a feature. This produces a systematic distortion in any archive built by memory. The base rate is stored thinly because its members interfere with one another, while the exception is stored richly because nothing competes with it. Later, frequency is judged from that archive.

Why it stays hidden

The distortion hides because the archive is the only source available for judging the base rate. To notice that the unusual is over-represented, you would need an independent count of the usual, which is exactly the thing that was not kept. The record therefore certifies its own proportions and cannot be audited from inside.