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arXiv 2205.09249cs.CLcs.AIcs.CVcs.RO
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用验证集评价Agent模型泛化能力的局限性

On the Limits of Evaluating Embodied Agent Model Generalization Using Validation Sets

UNC Chapel Hill(北卡罗来纳大学教堂山分校);Amazon Alexa AI(亚马逊Alexa人工智能部门)

Hyounghun Kim, Aishwarya Padmakumar, Di Jin, Mohit Bansal, Dilek Hakkani-Tur

摘要:

自然语言引导的具身任务完成是一个具有挑战性的问题,因为它需要理解自然语言指令,将它们与以自我为中心的视觉观察对齐,并选择适当的动作在环境中执行以产生期望的变化。我们尝试使用有效利用更宽视野的模块来增强Transformer模型,并学习选择下一步是否需要导航或操作操作。我们观察到,所提出的模块在流行基准数据集ALFRED的一个看不见的验证集上带来了改进,实际上是最先进的性能。然而,我们使用看不见的验证集选择的最佳模型在ALFRED的看不见的测试分割上表现不佳,这表明看不见的验证集的性能本身可能并不足以表明模型改进是否推广到看不见的测试集。我们强调这一结果,因为我们相信这可能是机器学习任务中更广泛的现象,但主要是在限制测试分割评估的基准测试中才能注意到,并强调需要修改基准测试设计,以更好地考虑模型性能的变化。

英文摘要:

Natural language guided embodied task completion is a challenging problem since it requires understanding natural language instructions, aligning them with egocentric visual observations, and choosing appropriate actions to execute in the environment to produce desired changes. We experiment with augmenting a transformer model for this task with modules that effectively utilize a wider field of view and learn to choose whether the next step requires a navigation or manipulation action. We observed that the proposed modules resulted in improved, and in fact state-of-the-art performance on an unseen validation set of a popular benchmark dataset, ALFRED. However, our best model selected using the unseen validation set underperforms on the unseen test split of ALFRED, indicating that performance on the unseen validation set may not in itself be a sufficient indicator of whether model improvements generalize to unseen test sets. We highlight this result as we believe it may be a wider phenomenon in machine learning tasks but primarily noticeable only in benchmarks that limit evaluations on test splits, and highlights the need to modify benchmark design to better account for variance in model performance.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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