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Short Answer

What signal indicates that the Eyeball dev set has become overfit?

Question: In one to three sentences, describe the signal that indicates an Eyeball dev set has become overfit.

Sample answer: The signal is that performance on the Eyeball dev set is much better than performance on the Blackbox dev set. This gap suggests the tuning process has been fitted to the specific examples in the Eyeball dev set rather than generalizing.

Key points:

  • A large performance gap between Eyeball and Blackbox dev sets signals overfitting
  • The Eyeball dev set performs much better than the Blackbox dev set in this case

Rubric: Full credit for identifying the performance gap between the Eyeball and Blackbox dev sets as the overfitting signal.

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Updated 2026-07-10

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