The Role of Global Tokens in Mitigating 'Spiky' Attention
An AI researcher observes that a model processing very long text sequences has highly 'spiky' attention weight distributions, where a few tokens receive almost all the attention, leading to unstable training. Explain precisely how introducing global tokens would address this issue by altering the output of the function used to calculate these attention weights.
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Ch.2 Generative Models - Foundations of Large Language Models
Foundations of Large Language Models
Foundations of Large Language Models Course
Computing Sciences
Analysis in Bloom's Taxonomy
Cognitive Psychology
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An engineer is training a model on very long documents and observes that the attention mechanism is behaving erratically. The model's focus shifts dramatically between tokens from one training step to the next, leading to poor convergence. A closer look at the attention weight distributions reveals they are often extremely "peaky," with one or two tokens receiving nearly all the weight (e.g., weights like [0.01, 0.98, 0.01]), and the location of this peak changes unpredictably. Which of the following interventions is most likely to mitigate this issue by directly addressing the unstable nature of the attention weight distribution?
Mechanism of Attention Stabilization
The Role of Global Tokens in Mitigating 'Spiky' Attention