One Objective for All Models -- Self-supervised Learning for Topic Models

• URL: http://arxiv.org/abs/2203.03539v1
• Date: Wed, 2 Feb 2022 06:20:59 GMT
• Title: One Objective for All Models -- Self-supervised Learning for Topic Models
• Authors: Zeping Luo, Cindy Weng, Shiyou Wu, Mo Zhou, Rong Ge
• Abstract summary: We highlight a key advantage of self-supervised learning -- when applied to data generated by topic models, self-supervised learning can be oblivious to the specific model. In particular, we prove that commonly used self-supervised objectives based on reconstruction or contrastive samples can both recover useful posterior information for general topic models.
• Score: 11.67381769733002
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Self-supervised learning has significantly improved the performance of many NLP tasks. In this paper, we highlight a key advantage of self-supervised learning -- when applied to data generated by topic models, self-supervised learning can be oblivious to the specific model, and hence is less susceptible to model misspecification. In particular, we prove that commonly used self-supervised objectives based on reconstruction or contrastive samples can both recover useful posterior information for general topic models. Empirically, we show that the same objectives can perform competitively against posterior inference using the correct model, while outperforming posterior inference using misspecified model.

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