Length Generalization
Length generalization, the ability of machine learning models to extrapolate their performance to input sequences longer than those seen during training, is a critical challenge in sequence processing. Current research focuses on understanding the limitations of transformer architectures and developing methods to improve their length generalization capabilities, often involving modifications to positional encodings, attention mechanisms, or training strategies. This research is significant because overcoming length limitations is crucial for deploying these models in real-world applications requiring processing of long sequences, such as long-document understanding and complex reasoning tasks. Improved length generalization would enhance the applicability and robustness of large language models and other sequence-processing systems.
Papers
Length is a Curse and a Blessing for Document-level Semantics
Chenghao Xiao, Yizhi Li, G Thomas Hudson, Chenghua Lin, Noura Al Moubayed
What Algorithms can Transformers Learn? A Study in Length Generalization
Hattie Zhou, Arwen Bradley, Etai Littwin, Noam Razin, Omid Saremi, Josh Susskind, Samy Bengio, Preetum Nakkiran