Author

R. Balabantaray

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#artificial intelligence Preprint Sep 2026

CHI: A Composite Hallucination Index Unifying Entity, Relation, and Quantity Dimensions for Summarization Evaluation

CHI (Composite Hallucination Index), the first unified hallucination metric that decomposes faithfulness errors into three orthogonal dimensions, provides practitioners with a decomposable, interpretable, and efficient faithfulness metric suitable for both offline evaluation and online monitoring of summarization syste...

Praveenkumar Katwe, R. Balabantaray, Kali Prasad Vittala · 0 citations

Jul 2026

Abstractiveness Metrics for Evaluating Text Summarization: A Refined Formulation with Empirical Validation

Quantifying abstractiveness in generated summaries is essential for evaluating summarization models beyond surface-level metrics like ROUGE. We introduce Reference Abstraction (RA), Summary Abstraction (SA), and Abstraction Ratio (AR) -- a set of principled heuristic metrics that measure how much a summary diverges fro...

Praveenkumar Katwe, R. Balabantaray, Kali Prasad Vittala · arXiv.org · 0 citations