Vocabulary

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A practical dictionary of 512 AI, machine learning, mathematics, and programming terms from HerbDev’s AI Vocabulary app. Start with a definition, explore an example, then follow the concepts behind it.

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Data Leakage

Data & Datasets · Level 2 of 5

Data Leakage

Information entering training or development that would be unavailable at real prediction time.

Leakage can inflate evaluation results without improving deployable performance.

Example

A predictor accidentally uses a field recorded only after the outcome.

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Audio transcript

Data Leakage. Information entering training or development that would be unavailable at real prediction time. Leakage can inflate evaluation results without improving deployable performance. For example: A predictor accidentally uses a field recorded only after the outcome.

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This helps you prevent misleading experiments caused by data preparation and split mistakes.

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