Continual Learning for Encoder-only Language Models via a Discrete Key-Value Bottleneck

• URL: http://arxiv.org/abs/2412.08528v1
• Date: Wed, 11 Dec 2024 16:38:34 GMT
• Title: Continual Learning for Encoder-only Language Models via a Discrete Key-Value Bottleneck
• Authors: Andor Diera, Lukas Galke, Fabian Karl, Ansgar Scherp,
• Abstract summary: We introduce a discrete key-value bottleneck for encoder-only language models.<n>Inspired by the success of a discrete key-value bottleneck in vision, we address new and NLP-specific challenges.
• Score: 6.137272725645159
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Continual learning remains challenging across various natural language understanding tasks. When models are updated with new training data, they risk catastrophic forgetting of prior knowledge. In the present work, we introduce a discrete key-value bottleneck for encoder-only language models, allowing for efficient continual learning by requiring only localized updates. Inspired by the success of a discrete key-value bottleneck in vision, we address new and NLP-specific challenges. We experiment with different bottleneck architectures to find the most suitable variants regarding language, and present a generic discrete key initialization technique for NLP that is task independent. We evaluate the discrete key-value bottleneck in four continual learning NLP scenarios and demonstrate that it alleviates catastrophic forgetting. We showcase that it offers competitive performance to other popular continual learning methods, with lower computational costs.

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