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Aaron Mueller

@amuuueller

Asst. Prof. in CS at @BU_Tweets ≡ {Mechanistic, causal} {interpretability, NLP}
Boston aaronmueller.github.io Joined September 2015
736 Following 2.1K Followers 365 Posts

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Aaron Mueller @amuuueller
Language models should be less confident when an input is ambiguous. We derive ambiguity vectors, and use them to improve confidence estimation in language models. We can also use them to encode these improvements into the model weights!

New work led by @themistoklisnk!
Themistoklis Nikas @themistoklisnk 15h
LLMs are highly overconfident, even when they don’t know something. We used interpretability to improve LLM confidence estimates!

We propose DART, which uses ambiguity steering vectors to guide fine-tuning, improving calibration across 7 models while preserving accuracy.
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Aaron Mueller @amuuueller
Congrats to those with accepted NeurIPS papers! If you have work on vision-language modeling or egocentric learning, consider submitting your paper to the BabyVLM Workshop fast track by Sep. 27 AoE (end of the weekend).

See the website for more details: babyvlm.github.io/#fast-track
babyvlm.github.io The BabyVLM Workshop — NeurIPS 2026 How can we get multimodal models to learn as efficiently as human infants? BabyVLM @ NeurIPS 2026.