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LLMs Struggle to Measure What Distinguishes Students of Different Proficiency Levels: A Study of Item Discrimination in Reading Comprehension Assessment

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arXiv:2606. 18709v1 Announce Type: new Abstract: Item discrimination is a fundamental psychometric property of educational assessment, which measures whether an item meaningfully distinguishes students with higher proficiency from students with lower proficiency.

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Authors: Han Chen, Ming Li, Chenguang Wang, Yijun Liang, Dawei Zhou, Hong jiao, Tianyi Zhou
Released: 2026-06-18 (21d ago)
Topic: Related to current project
Relation to my work: Read next because LLMs Struggle to Measure What Distinguishes Students of Different Proficiency Levels: A Study of Item Discrimination in Reading Comprehension Assessment overlaps with clean result "LoRA persona trained on <A> alone emits <B> at 23.5% when a co-trained partner learns <A>...<B>, vs 0% control on Qwen2.5-7B-Instruct (MODERATE confidence)", clean result "Leakage rate is a usable signal for recovering trigger-shaped phrases on Gaperon-1125-1B without knowing the hidden trigger itself (MODERATE confidence)", clean result "Language-mismatch LoRA SFT on Qwen2.5-7B leaks the trained completion language into bystander directives the model was never trained on, absent under same-language SFT (LOW confidence)". Matching terms: strong, persona, class, rect, alignment, eval, rate, full. Source: arxiv cs.CL (NLP).
arXiv: 2606.18709

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