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Momose Oyama

6 accepted papers

2025

Likelihood Variance as Text Importance for Resampling Texts to Map Language Models

EMNLP 2025

We address the computational cost of constructing a model map, which embeds diverse language models into a common space for comparison via KL divergence. The map relies on log-likelihoods over a large text set, making the cost proportional to the number of texts. To reduce this cost, we propose a re

2025

Mapping 1,000+ Language Models via the Log-Likelihood Vector

ACL 2025long

To compare autoregressive language models at scale, we propose using log-likelihood vectors computed on a predefined text set as model features. This approach has a solid theoretical basis: when treated as model coordinates, their squared Euclidean distance approximates the Kullback-Leibler divergen…

Cited by 0SourcePDFScholar
2025

Revisiting Cosine Similarity via Normalized ICA-transformed Embeddings

COLING 2025main

Cosine similarity is widely used to measure the similarity between two embeddings, while interpretations based on angle and correlation coefficient are common. In this study, we focus on the interpretable axes of embeddings transformed by Independent Component Analysis (ICA), and propose a novel int…

2024

Understanding Higher-Order Correlations Among Semantic Components in Embeddings

EMNLP 2024main

Independent Component Analysis (ICA) offers interpretable semantic components of embeddings.While ICA theory assumes that embeddings can be linearly decomposed into independent components, real-world data often do not satisfy this assumption. Consequently, non-independencies remain between the estim…