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Chenghao Xiao

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#natural language process... Preprint Oct 2026

JudgeMoE: Distributional Aggregation for LLM-as-a-Judge

When an LLM judge scores an output, its score distribution retains uncertainty and disagreement information that is lost after scalar compression. We introduce JudgeMoE, a lightweight aggregator that assigns example-specific weights to cached judge score distributions and fuses them before computing a final score. A pr...

Yiqi Liu, Joseph James, Yang Wang et al. · 0 citations
Preprint Aug 2026

Broken Symmetry in LLM Refusal: Answer Release Is More Local Than Refusal Restoration

When a language model refuses to answer a prompt, it is unclear whether the correct answer is erased from its internal representations, or merely suppressed at the output layer. We investigate this mechanism using a controlled withhold setting, which yields perfectly matched answering and refusal trajectories for bidir...

Yiqi Liu, Yang Wang, Songxin Wang et al. · 0 citations
Preprint Aug 2026

When Tool-Backed Skill Retrieval Fails: Source-Style Collapse in Executable Capability Retrieval

This work proposes ToolScout, a source-aware routing method that uses query-side TF-IDF fingerprints flag source styles on which the fine-tuned retriever is likely to fail better than semantic or length-based proxies, giving a cheap signal for mismatch over a fixed tool corpus.

Yiqi Liu, Joseph James, Yang Wang et al. · 2 citations
#natural language process... Preprint Aug 2026

Reading Between the Frames: Interpreting Implicit and Non-literal Meaning in Social Media Videos

A benchmark for evaluating whether models can infer the implicit, non-linear, and rhetorically layered meanings of social media videos that appear nonsensical on the surface but convey deliberate pragmatic meanings, and a diagnostic setting for measuring the gap between multimodal perception and pragmatic comprehension...

Yang Wang, Ya-Nan Ma, Yiqi Liu et al. · 0 citations

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