Kaggle's 30 Days Of ML (Competition Part-7): What are public and private leaderboard?

Public and private leaderboards on Kaggle play pivotal roles in machine learning competitions. Kaggle selects samples from test data for the public leaderboard, showing scores only on those selected samples. It's essential to choose two submissions wisely: one based on the best cross-validation score and the other on the best public leaderboard score. Overfitting to the public leaderboard can mislead competitors as final scores reflect private evaluations of the remaining data that weren’t previously seen. The timing of the final evaluation can significantly affect competition outcomes, highlighting the importance of strategic submission selection.

Understanding the significance of public and private leaderboards in competitions.

Cross-validation prevents overfitting to the public leaderboard and ensures better submission strategies.

Public leaderboard scores may not represent true final performance due to data sampling.

Selecting one submission from cross-validation and another from leaderboard is recommended.

AI Expert Commentary about this Video

AI Governance Expert

The transparency of public and private leaderboards on Kaggle highlights critical ethical concerns addressing how model evaluations can impact participants' approaches. With the potential for overfitting, participants must prioritize fair strategies that prioritize model robustness over merely competing for leaderboard positions.

AI Data Scientist Expert

Implementing a structured cross-validation strategy is necessary for effective model validation, particularly in competitive environments. Utilizing a blend of validation scores and public leaderboard performance aids in distinguishing models that generalize better across unseen data sets.

Key AI Terms Mentioned in this Video

Public Leaderboard

The video discusses its role in evaluating participant submissions during Kaggle competitions.

Private Leaderboard

It's important as it reflects the true performance of model submissions.

Cross-Validation

The video emphasizes its importance in avoiding overfitting during competitions.

Companies Mentioned in this Video

Kaggle

The discussion on leaderboards highlights its vital role in shaping participant strategies.

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Industry:

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