Concept

Eyeball Dev Set

The Eyeball dev set is the portion of a split dev set that one manually examines for error analysis. It is named Eyeball as a reminder that it is being looked at with the eyes; for a speech recognition project in which one listens to audio clips, it might instead be called an Ear dev set. It is created by randomly selecting some fraction of the dev set, for example 10%, with the aim of including roughly 100 misclassified examples to look at. Continuing the running example, 10% of a 5,000-example dev set produces an Eyeball dev set of 500 examples, of which the algorithm is expected to misclassify about 100.

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Updated 2026-05-26

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