An Evaluation of Large Language Models for Procedural Action Anticipation

This study evaluates large language models (LLMs) for their effectiveness in long-term action anticipation. Traditional approaches primarily depend on representation learning from extensive video data to understand human activities, a process fraught with challenges due to the intricate nature and variability of these activities. A significant limitation of this method is the difficulty in obtaining effective video representations. Moreover, relying solely on videobased learning can restrict a model’s ability to generalize in scenarios involving long-tail classes and out-of-distribution examples. In contrast, the zero-shot or few-shot capabilities of LLMs like ChatGPT offer a novel approach to tackle the complexity of long-term activity understanding without extensive training. We propose three prompting strategies: a plain prompt, a chain-of-thought-based prompt, and an in-context learning prompt. Our experiments on the procedural Breakfast dataset indicate that LLMs can deliver promising results without
specific fine-tuning.