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Benchmarking non-conformity score functions in conformal prediction

arxiv.org/abs/2605.24983

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Updated 6 h ago · first seen 11 Sept 2026

paper_01M294FS8CHZM1X9Q66DPTSM2V

Published
11 Sept 2026
T1 · 6 h ago
arXiv
2605.24983
T1 · 6 h ago
Category
cs.LG
T1 · 6 h ago

Abstract

Conformal prediction is a useful and versatile alternative to model calibration in machine learning classification. It replaces single-class prediction with prediction sets, guaranteeing that the a priori probability of the prediction sets containing the true class is larger than or equal to a pre-specified rate. The size and usefulness of the prediction sets relies heavily on the choice of the non-conformity score function. The scientific literature contains many examples of non-conformity score functions but there is an absence of studies examining their properties and effectiveness. In this paper, we give an overview of properties of non-conformity score functions. We give examples of non-conformity score functions in the existing literature and introduce original modifications. We introduce an original method of evaluating the prediction set sizes of conformal predictors and use it to provide a comparison between non-conformity score functions. We also examine efficacy of different non-conformity score functions for class-conditional conformal prediction in a setting with imbalanced classes.

Authors 1

Sol Erika Boman

Specification

Official page

Source:arXiv (Atom API + RSS)T1observed 6 h agohigh

Arxiv announce type
replace

Source:arXiv (Atom API + RSS)T1observed 6 h agohigh

arXiv id
2605.24983

Source:arXiv (Atom API + RSS)T1observed 6 h agohigh

Categories
cs.LG

Source:arXiv (Atom API + RSS)T1observed 6 h agohigh

PDF

Source:arXiv (Atom API + RSS)T1observed 6 h agohigh

Primary category
cs.LG

Source:arXiv (Atom API + RSS)T1observed 6 h agohigh

Published
11 Sept 2026

Source:arXiv (Atom API + RSS)T1observed 6 h agohigh

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Provenance

Attributed facts

9

Source tiers

T19

Freshest observation

6 h ago

Conflicts

None