arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.06114cs.CL
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大规模多角色生成式对话框建模

Large Scale Multi-Actor Generative Dialog Modeling

University of California, Irvine(加州大学欧文分校);NVIDIA(英伟达)

Alex Boyd, Raul Puri, Mohammad Shoeybi, Mostofa Patwary, Bryan Catanzaro

摘要:

非目标导向的对话代理(即聊天机器人)旨在与用户进行不同的和有吸引力的对话;然而,它们通常在对话中表现出不一致的个性或所有用户的平均个性。本文解决了这些问题,通过控制代理人的角色生成后,通过调节先前的对话的目标演员。通过这样做,我们能够在一个人的讲话中利用更抽象的模式,并在生成的响应中更好地模仿它们。这项工作介绍了生成会话控制模型,一个增强和微调的GPT-2语言模型的条件下,过去的参考对话概率模型多轮对话中的演员的角色。我们引入了一个附带的数据汇集过程,从6个月的Reddit评论中获得1030万次对话。我们证明,将模型大小从117 M扩展到8.3B参数,在1.7M的Reddit对话中,困惑度从23.14提高到13.14。增加模型规模在人类评估中也取得了类似的改善,这些评估衡量了模型样本对现实主义(31%增加到37%),风格匹配(37%到42%),语法和内容质量(29%到42%)以及会话一致性(32%到40%)的偏好。我们发现,有条件地建模过去的对话提高了0.47的自动评估的困惑。通过人体试验,我们确定了条件建模和风格匹配之间的积极趋势,并概述了进一步改善人物角色控制的步骤。

英文摘要:

Non-goal oriented dialog agents (i.e. chatbots) aim to produce varying and engaging conversations with a user; however, they typically exhibit either inconsistent personality across conversations or the average personality of all users. This paper addresses these issues by controlling an agent's persona upon generation via conditioning on prior conversations of a target actor. In doing so, we are able to utilize more abstract patterns within a person's speech and better emulate them in generated responses. This work introduces the Generative Conversation Control model, an augmented and fine-tuned GPT-2 language model that conditions on past reference conversations to probabilistically model multi-turn conversations in the actor's persona. We introduce an accompanying data collection procedure to obtain 10.3M conversations from 6 months worth of Reddit comments. We demonstrate that scaling model sizes from 117M to 8.3B parameters yields an improvement from 23.14 to 13.14 perplexity on 1.7M held out Reddit conversations. Increasing model scale yielded similar improvements in human evaluations that measure preference of model samples to the held out target distribution in terms of realism (31% increased to 37% preference), style matching (37% to 42%), grammar and content quality (29% to 42%), and conversation coherency (32% to 40%). We find that conditionally modeling past conversations improves perplexity by 0.47 in automatic evaluations. Through human trials we identify positive trends between conditional modeling and style matching and outline steps to further improve persona control.

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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