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Testing for concept shift online

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arxiv 2012.14246 v1 pith:UZICKOJB submitted 2020-12-28 cs.LG stat.ML

classification cs.LGstat.ML
keywords shiftconceptmartingalesassumptiondatasetdetectsexchangeabilityprocesses
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This note continues study of exchangeability martingales, i.e., processes that are martingales under any exchangeable distribution for the observations. Such processes can be used for detecting violations of the IID assumption, which is commonly made in machine learning. Violations of the IID assumption are sometimes referred to as dataset shift, and dataset shift is sometimes subdivided into concept shift, covariate shift, etc. Our primary interest is in concept shift, but we will also discuss exchangeability martingales that decompose perfectly into two components one of which detects concept shift and the other detects what we call label shift. Our methods will be based on techniques of conformal prediction.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. WATCH: Adaptive Monitoring for AI Deployments via Weighted-Conformal Martingales

    cs.LG 2025-05 conditional novelty 7.0 of 10

    WCTMs generalize conformal test martingales to test non-exchangeability nulls, enabling adaptation to mild covariate shifts, fast detection of harmful shifts, and root-cause diagnosis.

  2. Adapting to Fragmented and Evolving Data: A Fisher Information Perspective

    cs.LG 2025-07 reject novelty 4.0 of 10

    FADE adapts to sequential covariate shift by combining a Fisher-weighted KL shift signal with a smoothed Fisher information regularizer, reporting gains on vision, text, and tabular benchmarks.

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